Turbulence: spiller of coffee, jostler of luggage, filler of barf bags, rattler of nerves. But is it a crasher of planes? Judging by the reactions of many airline passengers, one would assume so; turbulence is far and away the number one concern of anxious passengers.
The Boeing RC-135 is the most effective American spyplane you've never heard of. It's the John Paul Jones to the SR-71's Robert Plant—a quiet workhorse that has flown over countless US missions while providing vital, real-time signals intelligence.