The U.S. Coast Guard in Alaska found the wreckage of a small plane atop frozen sea ice on Friday, after the aircraft suddenly lost altitude on Thursday and the crash killed all 10 people on board, officials said.

On Jan. 29, an American Airlines passenger plane and an Army helicopter collided near Washington, D.C., killing 67 people in the deadliest air disaster in more than two decades. Just days later, a Medevac jet crashed into a busy neighborhood in Philadelphia, killing seven people and injuring over 20 others.