For one terrible heartbeat he thought this a runway collision.

Linate Airport disaster, a runway collision in Italy killing 118 people.

The effort was designed to tackle one of the most worrisome and fastest growing problems in commercial aviation, runway collisions.

An air traffic controller whose decisions might have contributed to a fatal runway collision in December defended his actions today.

But runway collisions between airplanes are not unheard of.

Tenerife airport disaster, a 1977 runway collision that claimed the lives of 583 people.

Madrid runway disaster, a runway collision in Spain that took the lives of 93 people.

A Court Line aircraft was involved in a runway collision at Luton Airport.

Since 1990, six runway collisions have killed 63 people in the United States.

At the same time, the risk of runway collision may be increasing, experts say.