Airborne Laser (ABL)

Boeing : Missile Defense System - Airborne Laser Test Bed

The ALTB program places battle management equipment, a beam control/fie control system,
and a high-energy Chemical Oxygen Iodine Laser (COIL) on a modified Boeing 747-400F
aircraft to support the potential application of directed energy for missile defense.

According to MDA, the experiment began at 8:44 pm Pacific Standard Time when “a short-range threat-representative ballistic missile was launched from an at-sea mobile launch platform.

Within seconds, the ALTB used onboard sensors to detect the boosting missile and used a low-energy laser to track the target. The ALTB then fired a second low-energy laser to measure and compensate for atmospheric disturbance. Finally, the ALTB fired its megawatt-class, high-energy laser, heating the boosting ballistic missile to critical structural failure. 

The entire engagement occurred within two minutes of the target missile launch, while its rocket motors were still thrusting.”

This experiment marks the first time a laser weapon has engaged and destroyed an inflight
ballistic missile, and the first time that any system has accomplished it in the
missile's boost phase of flight. ALTB has the highest-energy laser ever fired from an
aircraft, and is the most powerful mobile laser device in the world.

The photos and information provided by Boeing.
Strange Weapons - Modern Marvels. The brief introduction of Airborne Laser.

1. How did Airborne Laser locate where the ballistic missile launches ?
2. How long does the Chemical Laser recharge to shoot the next one ?
3. If Airborne Laser failed at the ballistic missile boost phase, is it capable to destroy at
    supersonic range ?