Air crash investigations can take months, and federal investigators told reporters they would not speculate on the cause.
The camp serves as a launchpad for athletes vying for their spot on Team USA in the upcoming world championships.
One air traffic controller was reportedly working two tower positions at the time of Wednesday's fatal crash near D.C.
Staffing was 'not normal' in air traffic control tower at time of midair collision, FAA report obtained by AP says. Got a question? Put a reporter on it. Ever think of a question that you wish someone ...