Black boxes have been recovered from the wreckage of a jet and helicopter crash in Washington D.C.
Among the 64 people believed to have died on the flight were competitors returning from the US Figure Skating Championships in Wichita, Kansas.
Without evidence, US President Donald Trump blamed air traffic controllers, the helicopter pilots and Democratic policies.
He also claimed - without any proof - that workers with "severe intellectual disabilities" were being hired through a diversity drive.
