The bombers' radar-evading design makes them among the most recognizable aircraft in the world, and their presence at RAF Fairford air base in England caused an unidentified Twitter user to comment, "They seem to defy science!"
Another Twitter comment said, "Just saw a Stealth Bomber fly over our house. Amazing aircraft. My son wanted to know if Batman was flying it."
The planes are in Europe, in the midst of the Ukrainian military conflict, to familiarize pilots with air bases and area operations. A U.S. Air Force press release avoided mentioning Ukraine in its informational briefing, although U.S. fighter jets have been deployed to Europe in a show of NATO solidarity.
The two B-2 bombers are among 20 in the U.S. Air Force fleet, and are assigned to the 509th Bomber Wing at Missouri's Whiteman Air Base.
Notable deaths of 2014 [PHOTOS]