Justices were skeptical Monday that the case was an exception to other lawsuits against defense contractors, which usually get immunity in such litigation.
Soon after planes were first used in war, there were specialists on the ground coordinating strikes. Space-based weapons could one day yield new observers.
Taking off from the U.S. heartland, B-2 stealth bombers, aided by refueling tankers and fighter jets, delivered a total of 420,000 pounds of explosives.