The Chilcot Report , a British inquiry Scrutiny into its decision to go to war , was published Publishing in 2016 and concluded Process_end military action may have been necessary but was not the last resort at the time and that the consequences of invasion were underestimated Judgment_communication .

Costs , mainly in terms of lost work Employment time , are estimated to amount to around £1.2 billion , although this may be underestimated Judgment_communication .

The accident Catastrophe was investigated Check by the Canadian Aviation Safety Board ( CASB ) , which determined Deciding the probable cause Causation of the crash Catastrophe was the aircraft 's unexpectedly high drag and reduced lift Motion condition , most likely due Causation to ice contamination on the wings ' leading edges and upper surfaces , as well as underestimated Judgment_communication onboard weight .