air florida flight 90 was a scheduled Hold u.s. domestic passenger flight operated Being_in_operation by air florida from washington national airport ( now ronald reagan washington national airport ) to fort unk international airport with an intermediate stopover at tampa international airport .

the u.s. army air service played Participation a significant role in this action .

at the time , it was the deadliest mass shooting Use_firearm committed Commitment by a lone gunman in u.s. history , until it was surpassed Cause_change_of_position_on_a_scale by the 2016 orlando nightclub shooting Use_firearm .

multiple investigations Scrutiny in the aftermath of the storm Catastrophe concluded Coming_to_believe that the u.s. army corps of engineers , which had designed Creating and built Building the region 's levees decades earlier , was responsible for the failure of the flood-control systems , though federal courts later ruled Legal_rulings that the corps could not be held financially liable because of sovereign immunity in the flood control Control act of 1928 .

fifty-two american diplomats and citizens were held Defending hostage for 444 days from november 4 , 1979 , to january 20 , 1981 , after a group of iranian college students belonging to the muslim student followers of the imam 's line , who supported Supporting the iranian revolution Change_of_leadership , took over Conquering the u.s. embassy in tehran .

in iran it was widely seen Perception_active as an act against the u.s. and its influence Influence in iran , including its perceived Perception_active attempts to undermine the iranian revolution Change_of_leadership and its longstanding support Supporting of the shah of iran , mohammad reza pahlavi , who was overthrown Change_of_leadership in 1979 .

the 1954 guatemalan coup UNK , code-named operation unk , was a covert operation Military_operation carried out Action by the u.s. central intelligence agency ( cia ) that deposed Removing the democratically elected Choosing guatemalan president jacobo unk and ended Process_end the guatemalan revolution Change_of_leadership of unk .

the joint u.s. forces of some 1,100 u.s. personnel , included Cause_to_be_included airmen , sailors , soldiers , and marines , as well as aircraft from every arm of the united states armed forces .

the joint u.s. forces of some 1,100 u.s. personnel , included Cause_to_be_included airmen , sailors , soldiers , and marines , as well as aircraft from every arm of the united states armed forces .

the affair was investigated Criminal_investigation by the u.s. congress and by the three-person , unk tower commission .

the 2011 white house shooting occurred Coming_to_be on november 11 , 2011 , when oscar ramiro unk , an unemployed 21-year-old man , fired Use_firearm a semi-automatic rifle at the white house , the official residence of the u.s. president in washington , d.c. at least seven bullets hit the second floor .

japanese forces Causation used the area to regroup from attacks Attack against u.s. forces Causation on the island , to launch further attacks Attack on the u.s. defenses that guarded Patrolling the allied airfield ( called Name_conferral henderson field ) located at lunga point on guadalcanal , as a base to defend Defending against allied attacks Attack directed Aiming at japanese troop and supply Supply encampments between point cruz and cape esperance on western guadalcanal , and as a location for watching and reporting Reporting on allied activity around henderson field .

japanese forces Causation used the area to regroup from attacks Attack against u.s. forces Causation on the island , to launch further attacks Attack on the u.s. defenses that guarded Patrolling the allied airfield ( called Name_conferral henderson field ) located at lunga point on guadalcanal , as a base to defend Defending against allied attacks Attack directed Aiming at japanese troop and supply Supply encampments between point cruz and cape esperance on western guadalcanal , and as a location for watching and reporting Reporting on allied activity around henderson field .

palmer , age 30 , also won the u.s. open in 1960 and was the runner-up at the british open Openness .

argo 16 was the codename of an italian air force c-47 dakota aircraft , registration unk , used by the italian secret service Rite sid and the u.s. central intelligence agency ( cia ) in covert operations .

six hostages in particular were kept Temporary_stay because they were men and american citizens , not necessarily jews : robert norman schwartz , a u.s. defense Defending department researcher stationed in thailand ; james lee woods , schwartz 's assistant and security detail ; gerald berkowitz , an american-born jew and college chemistry professor ; rabbi abraham unk and his brother rabbi joseph unk , two brooklyn school teachers ; and john hollingsworth , a u.s. state department employee .

six hostages in particular were kept Temporary_stay because they were men and american citizens , not necessarily jews : robert norman schwartz , a u.s. defense Defending department researcher stationed in thailand ; james lee woods , schwartz 's assistant and security detail ; gerald berkowitz , an american-born jew and college chemistry professor ; rabbi abraham unk and his brother rabbi joseph unk , two brooklyn school teachers ; and john hollingsworth , a u.s. state department employee .

it was the largest nuclear weapons testing Testing program ever conducted Action by the united states and the last atmospheric test series conducted Action by the u.s. , as the limited Limiting test Testing ban treaty was signed Sign_agreement in moscow the following year .

ambassador to libya j. christopher stevens and u.s. foreign service information management officer sean smith .

later , after gaining Getting soviet air clearance , the u.s. army air force sent Sending one high-level mass airdrop as part of operation `` frantic '' .

on august 24 , 1814 , after defeating Conquering the americans at the battle Military_operation of bladensburg , a british force led by major general robert ross burned Destroying down multiple buildings , including the white house ( then called the `` presidential mansion '' ) , the capitol building , as well as other facilities of the u.s. government .

although projected public radiation exposures from commercial use of stimulated gas had been reduced Cause_change_of_position_on_a_scale to less than 1 % of background , it became Becoming clear in the early 1970s that public acceptance within the u.s. of any product containing Cause_to_be_included radioactivity , no matter how minimal , was difficult if not impossible .

although most of its participants are from the u.s. , students from countries such as the bahamas , canada , the people 's republic of china , india , ghana , japan , jamaica , mexico , and new zealand have also competed Competition in recent years .

the parent placed Placing the coffin near the fence at the white house expressing Expressing_publicly president bush 's culpability in the deaths of u.s. troops who have lost Death their lives in iraq .

operation steel tiger was a covert u.s. 2nd air division , later seventh air force and u.s. navy task force 77 aerial interdiction effort targeted Aiming against the infiltration of people 's army of vietnam ( pavn ) men and material moving Motion south from the democratic republic of vietnam ( drv or north vietnam ) through southeastern laos to support Supporting their military effort in the republic of vietnam ( south vietnam ) during the vietnam war .

operation steel tiger was a covert u.s. 2nd air division , later seventh air force and u.s. navy task force 77 aerial interdiction effort targeted Aiming against the infiltration of people 's army of vietnam ( pavn ) men and material moving Motion south from the democratic republic of vietnam ( drv or north vietnam ) through southeastern laos to support Supporting their military effort in the republic of vietnam ( south vietnam ) during the vietnam war .

it is also often used Using by the u.s. armed forces during aviation safety training Education_teaching as an example of the importance of complying Action with safety regulations and correcting Resolve_problem the behavior of anyone who violates Causation safety procedures .

the soviet air forces treated the unidentified aircraft as an intruding u.s. spy plane , and proceeded Self_motion to destroy it with air-to-air missiles , after firing warning shots which were likely not seen by the kal pilots .

according to the official website , the protest asked Request u.s. `` legislators to oppose Agree_or_refuse_to_act the fisa improvements act , support Supporting the usa freedom Change_of_leadership act , and enact Action protections for unk . ''

on may 18 , 1980 , a major volcanic eruption Catastrophe occurred Presence at mount st. helens , a volcano located in skamania county , in the u.s. state of washington .

the result was the 1898 treaty of paris , negotiated Communication on terms favorable to the u.s. which allowed Preventing_or_letting it temporary control Control of cuba and ceded Surrendering ownership of puerto rico , guam , and the philippine islands .

operation eagle claw , known as operation tabas ( ) in iran , was a united states armed forces operation ordered by u.s. president jimmy carter to attempt to end Process_end the iran hostage crisis by rescuing Rescuing 52 embassy staff held Defending captive at the embassy of the united states , tehran on 24 april 1980 .

the u.s. and international security assistance force ( isaf ) authorities apologized Judgment_communication for the deaths .

the national assembly of afghanistan passed Motion_directional a resolution demanding Request a public trial in afghanistan , but then-u.s. secretary of defense leon panetta said Communication the soldier would be tried under u.s. military law .

on 15 march 2012 , an afghan parliamentary probe team made up of several members of the national assembly of afghanistan had speculated Coming_to_believe that up to 20 u.s. soldiers were involved Cause_to_be_included in the killings .

under the treaty of paris ( 1783 ) , which ended Process_end the american revolutionary war , great britain ceded Surrendering to the u.s. `` control Control '' of what were known as the ohio country and the illinois country , which were occupied Hold by numerous native american peoples .

the jay treaty in the same year arranged Arranging for cessions of british great lakes outposts on the great u.s. territory .

the free french corps pushed Motion through the mountains to the left on 14 may , supported Supporting by u.s. ii corps along the coast .

task force Military_operation baum was a secret and controversial world war ii task force set up Military_operation by u.s. army general george s. patton and commanded Control by capt .

although the 2011 earthquake Catastrophe was the largest on record , the usgs reported Reporting that the central and eastern u.s. ( ceus ) has undergone Bodily_harm the most dramatic increase Cause_change_of_position_on_a_scale in seismic Catastrophe activity in the united states since 2009 with an average of 318 earthquakes of magnitude 3.0 a year up from 24 a year from 1973 to 2008 .

operation barrel roll was a covert u.s. air force 2nd air division and u.s. navy task force 77 , interdiction and close air support campaign Military_operation conducted Action in the kingdom of laos between 14 december 1964 and 29 march 1973 concurrent with the vietnam war .

operation barrel roll was a covert u.s. air force 2nd air division and u.s. navy task force 77 , interdiction and close air support campaign Military_operation conducted Action in the kingdom of laos between 14 december 1964 and 29 march 1973 concurrent with the vietnam war .

an official united states air force record Recording of u.s. bombing Attack activity over indochina from 1964 to 1973 was declassified by u.s. president bill clinton in 2000 .

an official united states air force record Recording of u.s. bombing Attack activity over indochina from 1964 to 1973 was declassified by u.s. president bill clinton in 2000 .

operation tiger hound was a covert u.s. 2nd air division , later seventh air force and u.s. navy task force Military_operation 77 aerial interdiction campaign conducted Action in southeastern laos from 5 december 1965 till 11 november 1968 , during the vietnam war .

operation tiger hound was a covert u.s. 2nd air division , later seventh air force and u.s. navy task force Military_operation 77 aerial interdiction campaign conducted Action in southeastern laos from 5 december 1965 till 11 november 1968 , during the vietnam war .

the u.s. joint Collaboration chiefs of staff agreed Agree_or_refuse_to_act .

unlike operation barrel roll and `` steel tiger , '' however , the bombing Attack in the new area would be conducted Action by aircraft of the republic of vietnam air force and by u.s. air force units based in south vietnam ( aircraft participating Participation in `` barrel roll '' and `` steel tiger '' were generally based in thailand ) .

while filipino nationalists viewed Perception_active the conflict as a continuation of the struggle for independence that began Process_start in 1896 with the philippine revolution , the u.s. government regarded it as an insurrection .

miller rose Change_of_leadership to national prominence as the republican party nominee and the tea party favorite in the 2010 u.s. senate election Choosing in alaska .