The American military made a rare announcement that two nuclear-capable B-2 stealth bombers ran a practice bombing sortie over South Korea on Thursday, underscoring Washington's commitment to defend its ally amid rising tensions with North Korea. The two B-2 Spirit bombers made a nonstop round trip from Whiteman Air Force Base in Missouri, demonstrating the United States' ability to "provide extended deterrence to our allies in the Asia-Pacific region" and to "conduct long-range, precision strikes quickly and at will," the American command in the South Korean capital, Seoul, said in a statement. It was the first time the American military publicly confirmed a B-2 mission over the Korean Peninsula. As the bombers dropped inert munitions that they carried 6,500 miles over the Pacific to an island bombing range off South Korea's west coast, Secretary of Defense Chuck Hagel conferred with his South Korean counterpart, Kim Kwan-jin, on the phone, reaffirming the United States' "unwavering" commitment to defend the South.