(Courtesy photo/Chris Spannagle) Oklahoma National Guard Soldiers and Airmen respond to a devastating tornado that ripped through Moore, Okla., May 20, 2013. Oklahoma Gov. Mary Fallin activated the Airman and Soldiers May 20, to assist in victim search and security. (U.S. Army photo/Sgt. 1st Class Kendall James) Airman 1st Class Tracy Barnhill surveys the damage of her mother’s house after devastating tornado hit the homes of those living in Moore, Okla., May 20, 2013. Barnhill is assigned to 1the 37th Maintenance Group at Tinker Air Force Base, Okla. (U.S. Air Force photo/Senior Airman Mark Hybers) Oklahoma National Guard Soldiers and Airmen join civilian firefighters and police in searching for survivors through the rubble of a building that was devastated by a tornado that killed dozens of people in Moore, Okla., May 20, 2013. (U.S. Army photo/Sgt. 1st Class Kendall James) The Moore Medical Center – Norman Regional Hospital in Moore Okla., was ripped apart by the massive tornado May 20, 2013. The hospital was directly in the path of the 1.3 mile wide tornado that hit Moore in the late afternoon. There were no casualties reported. Cars flipped over and piled on top of one another along with cars that were cleared away by first responders fill the parking lot. The Orange X spray painted on the cars indicates that the vehicle was checked and cleared of any victims. (U.S. Air Force photo/Senior Airman Mark Hybers) A tornado ripped through Moore, Okla., just three miles south of Tinker Air Force Base May 20, 2013. (U.S. Army photo/Sgt. 1st Class Kendall James) A military member cuts trees that were brought down on homes after a tornado hit the town of Moore, Okla., May 20, 2013. (U.S. Air Force photo/Maj. Jon Quinlan) Oklahoma National Guard Soldiers and Airmen respond to a devastating tornado that ripped through Moore, Okla., May 20, 2013. Oklahoma Gov. Mary Fallin activated the Airman and Soldiers May 20, to assist in victim search and security. (U.S. Army photo/Sgt. 1st Class Kendall James) Oklahoma National Guard Soldiers and Airmen assist with victim search and security after a devastating tornado ripped through Moore, Okla., May 20, 2013. The unit members carried thermal imaging gear to help locate those buried in rubble. (U.S. Army photo/Sgt. 1st Class Kendall James) A U.S. flag flies from the ruble of a home destroyed in Moore, Okla, May 21, 2013. A powerful EF-5 tornado touched down approximately three miles south of Tinker AFB. (U.S. Air Force photo/Maj. Jon Quinlan) A U.S. flag hangs from a home devastated by a tornado that hit the town of Moore; Okla. May 20, 2013, near Tinker Air Force Base. (U.S. Air Force photo/Maj. Jon Quinlan) A twisted up sign from SW 6th and Telephone Road landed in the front yard of Master Sgt. Cherry Bina. Bina’s house was destroyed during the massive tornado that ripped through Moore Okla., May 20, 2013. Bina is an 137th Air Refueling Wing, Oklahoma Air National Guard member. (U.S. Air Force photo/Senior Airman Mark Hybers) Massive tornado hits near Tinker AFB by 507th Air Refueling Wing Public Affairs 5/20/2013 - TINKER AIR FORCE BASE, Okla. -- A powerful tornado touched down about three miles south of Tinker AFB hitting the town of Moore, Okla., May 20. The 507th Air Refueling Wing Crisis Action Team was activated and initiated accountability of all personnel assigned to the wing. The governor called up state National Guard troops to assist in disaster response efforts. "We are deeply devastated by this tornado, and our heart and prayers go out to all families that have been affected by this terrible event," said Col. Russell Muncy, 507th ARW commander. "At this time, we are attempting to determine the specific impact to our personnel, their families and the local community." The wing operates and maintains 12 KC-135R Stratotanker aircraft providing worldwide aerial refueling to U.S. military and NATO aircraft.