Designated the YAL - 1 , it was intended to kill short - and intermediate - range ballistic missiles in their boost phase .
Directed energy weapons are being developed , such as Boeing 's Airborne Laser which was constructed inside a Boeing 747 .
Designated the Airborne Laser     , it was intended to kill short - and intermediate - range ballistic missiles in their boost phase .
Directed energy weapons are being developed , such as Boeing 's Airborne Laser which was constructed inside a Boeing 747 .