Washington DC plane crash (AA5342)

Investigators testifying at a hearing into the January's mid-air crash in Washington DC suggest faulty altitude data may have led to a miscalculation.

The issue came to light after two landings at Reagan National airport had to be waved off because of a nearby Army helicopter.

The safety report follows January's deadly mid-air collision near Washington DC that killed 67 people.

Dozens were killed when a passenger plane and helicopter collided on 30 January and fell into the Potomac river.

The victims of the mid-air collision include dedicated flight attendants and talented ice skaters.

There were close calls at Reagan National airport and across the country before the collision that killed 67.

NTSB officials say recorders from both aircraft have been recovered in good condition as the investigation into the crash continues.