Apart from being the most common type of crash ... Between vehicles in motion, angled collisions accounted for 18% of all fatal crashes. Head-on collisions were low in number but highly lethal ...

The Federal Aviation Administration responded by requiring all commercial aircraft be equipped with a traffic collision avoidance system that monitors the air for other aircraft and warns pilots ...

A passenger jet hit an Army helicopter with three soldiers as the plane got ready to land at Reagan National near Washington, ...