The tragic accident, caused by a midair collision between a regional American Airlines jetliner and an Army helicopter, is the most recent fatal commercial aviation accident in the U.S.

In all, 67 people are feared dead after an American Airlines flight collided with a military helicopter over Washington, D.C.

The tragic accident involving an American Airlines regional jet and a military helicopter late Wednesday underscores how fatal crashes of passenger planes in the U.S. are rare, and “near misses” are also becoming rarer.