The NTSB continued its hearings Thursday into the deadly air collision between a military aircraft and a passenger jet.

The hearing, the second of three days, is focused on the training guidance of the parties involved in the Jan. 29 incident that resulted in the deaths of 67 people. NTSB started the daylong hearing examining the responsibilities and readiness of DCA's air traffic controllers.

A National Transportation Safety Board hearing revealed that the U.S. Army was aware of altitude discrepancies on Black Hawk helicopters.