Altitude
Newsflash: Both ICBMs and 747s can and do fly above the clouds. ;)
The United States' enormous jumbo-jet-mounted raygun, the Airborne Laser Testbed (ALTB), has suffered another embarrassing test failure. During an attempt to beam down a target missile off the Californian coast last week, a technical hitch saw the 747's blaster cannon fail to fire up. Warfare of the future as foreseen by the …
I don't understand most of the comments here, or the snark in the original article.
If they were 100% sure everything was going to work perfectly then they wouldn't have called it a "test", would they?
It appears it wasn't the big laser that failed. They didn't get around to turning it on because the targeting didn't lock on. That seems like a good thing to me -- wouldn't want to go spraying that thing around at random.