Acting administrator Chris Rocheleau describes the measure during a Senate hearing on the NTSB's preliminary report on January's fatal midair collision.

During the hearing, the head of the National Transportation Safety Board and members of Congress again questioned how the FAA hadn’t noticed an alarming number of close calls near Ronald Reagan National Airport and addressed the problem before the January collision between an Army helicopter and a jetliner.

The head of the Federal Aviation Administration has told Congress that the agency must do more to ensure flying remains safe after a midair collision over Washington, D