B-21 Raider
Of course, we’ve got to have the highly rumored-about B-21 Raider at spot number 21! When the Air Force set out requirements to make a Long-Range Strike Bomber (LRSB) for the 21st century, Northrup Grumman developed the B-21 Raider. The B-21 Raider will be a manned aircraft, although it’s calling card is the fact that it is a high-altitude, stealth, drone bomber. Air Force personnel overseeing the project have specified they want to have at least one human pilot in the loop (meaning on the controls) as this aircraft will be responsible for delivering nuclear payloads.