A U.S. Air Force B-52 Stratofortress from Andersen Air Force Base, Guam, conducted a low-level flight in the vicinity of Osan Air Base, South Korea, in response to recent provocative action by North Korea, Jan. 10, 2016. The B-52 was joined by a ROKAF F-15K Slam Eagle and a U.S. Air Force F-16 Fighting Falcon. The B-52 is a is a long-range, heavy bomber that can fly up to 50,000 feet and has the capability to carry 70,000 pounds of nuclear or precision guided conventional ordnance with worldwide precision navigation capability. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)

A U.S. Air Force B-52 Stratofortress from Andersen Air Force Base, Guam, conducted a low-level flight in the vicinity of Osan Air Base, South Korea, in response to recent provocative action by North Korea, Jan. 10, 2016. The B-52 was joined by a ROKAF F-15K Slam Eagle and a U.S. Air Force F-16 Fighting Falcon. The B-52 is a is a long-range, heavy bomber that can fly up to 50,000 feet and has the capability to carry 70,000 pounds of nuclear or precision guided conventional ordnance with worldwide precision navigation capability. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)

United Nations Command, U.S. Forces Korea deputy commander and U.S. 7th Air Force commander, Lt. Gen. Terrence O'Shaughnessy and Lt. Gen. Wang-keon Lee, ROK Air Force Operations Command commander, leave the podium area after speaking to Korean and international media at Osan Air Base, South Korea, Jan. 10, 2016, prior to a low-level pass from a U.S. Air Force B-52 Stratofortress in response to recent provocative action by North Korea. The B-52 was joined by a ROKAF F-15 Slam Eagle and a U.S. Air Force F-16 Fighting Falcon. The B-52 is a is a long-range, heavy bomber that can fly up to 50,000 feet and has the capability to carry 70,000 pounds of nuclear or precision guided conventional ordnance with worldwide precision navigation capability. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)

United Nations Command, U.S. Forces Korea deputy commander and U.S. 7th Air Force commander, Lt. Gen. Terrence O'Shaughnessy and Lt. Gen. Wang-keon Lee, ROK Air Force Operations Command commander, speak to Korean and international media at Osan Air Base, South Korea, Jan. 10, 2016, prior to a low-level pass from a U.S. Air Force B-52 Stratofortress in response to recent provocative action by North Korea. The B-52 was joined by a ROKAF F-15 Slam Eagle and a U.S. Air Force F-16 Fighting Falcon. The B-52 is a is a long-range, heavy bomber that can fly up to 50,000 feet and has the capability to carry 70,000 pounds of nuclear or precision guided conventional ordnance with worldwide precision navigation capability. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)

A U.S. Air Force B-52 Stratofortress from Andersen Air Force Base, Guam, conducted a low-level flight in the vicinity of Osan Air Base, South Korea, in response to recent provocative action by North Korea, Jan. 10, 2016. The B-52 was joined by a ROKAF F-15K Slam Eagle and a U.S. Air Force F-16 Fighting Falcon. The B-52 is a is a long-range, heavy bomber that can fly up to 50,000 feet and has the capability to carry 70,000 pounds of nuclear or precision guided conventional ordnance with worldwide precision navigation capability. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)

A United States Air Force B-52 Stratofortress from Andersen Air Base Guam,conducted a low-level flight in the vicinity of Osan, South Korea, in response to recent provocative action by North Korea Jan 10. The B-52 was joined by a ROK F-15K Slam Eagle and a U.S. F-16 Fighting Falcon. (U.S. Air Force photo by Airman 1st Class Dillian Bamman/Released)

A United States Air Force B-52 Stratofortress from Andersen Air Base Guam,conducted a low-level flight in the vicinity of Osan, South Korea, in response to recent provocative action by North Korea Jan 10. The B-52 was joined by a ROK F-15K Slam Eagle and a U.S. F-16 Fighting Falcon. (U.S. Air Force photo by Airman 1st Class Dillian Bamman/Released)

A U.S. Air Force B-52 Stratofortress from Andersen Air Force Base, Guam, conducted a low-level flight in the vicinity of Osan Air Base, South Korea, in response to recent provocative action by North Korea, Jan. 10, 2016. The B-52 was joined by a ROKAF F-15K Slam Eagle and a U.S. Air Force F-16 Fighting Falcon. The B-52 is a is a long-range, heavy bomber that can fly up to 50,000 feet and has the capability to carry 70,000 pounds of nuclear or precision guided conventional ordnance with worldwide precision navigation capability. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)

A U.S. Air Force B-52 Stratofortress from Andersen Air Force Base, Guam, conducted a low-level flight in the vicinity of Osan Air Base, South Korea, in response to recent provocative action by North Koream Jan. 10, 2016. The B-52 was joined by a ROKAF F-15K Slam Eagle and a U.S. Air Force F-16 Fighting Falcon. The B-52 is a is a long-range, heavy bomber that can fly up to 50,000 feet and has the capability to carry 70,000 pounds of nuclear or precision guided conventional ordnance with worldwide precision navigation capability. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)