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The close calls come as officials are investigating a string of safety incidents in recent weeks, including the deadly midair collision over the Potomac River, a Medevac jet crash in Philadelphia and a regional airline crash off the coast of Nome, Alaska, that killed 10 people. And last week, a Delta plane crashed while landing in Toronto, flipping upside-down as a wing " engulfed in flames " broke away from the fuselage. All 80 people on board survived.

Trumpf on the DCA plane crash: "Did you ever see, you go to a driving range in golf and you're hitting balls, hundreds of balls, thousands of hours. I never see a ball hit another ball. Balls going up all over the place. You never see 'em hit, it was amazing that could happen."