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 .

The Americans saw Self_motion the hostage-taking as an egregious violation Legality of the principles of international law , such as the Vienna Convention , which granted Giving diplomats immunity from arrest Arrest and made Causation diplomatic compounds inviolable .

On 23 November , Saleh signed Sign_agreement a power-transfer agreement brokered by the Gulf Cooperation Council in Riyadh , under which he would transfer Giving his power to his Vice-President , Abdrabbuh Mansur Hadi , within 30 days and leave Departing his post as president by February 2012 , in exchange Exchange for immunity from prosecution Legality .

Michael and Lori Fortier testified against McVeigh and Nichols ; Michael was sentenced Prison to 12 years in prison for failing to warn the United States government , and Lori received Receiving immunity from prosecution Legality in exchange for her testimony .