Helicopters should not be allowed to travel over a four-mile stretch over the Potomac River following the deadly air collision near Washington in January, according to urgent safety

All eyes are on D.C. after the United States Department of Transportation sent letters to transit leaders pushing for improvement in safety and security along roads, trains and buses. On March 5, U.S.

The secretary will discuss the NTSB's preliminary report on the January crash at Ronald Reagan Washington National Airport that killed a total of 67 people.