Personnel at Joint Base Andrews, Md., de-ice C-17 Globemaster III aircraft on the flightline, March 25, 2013, during a spring snowstorm. (U.S. Air Force photo/Staff Sgt. Brittany E. Jones)

A staff sergeant walks towards a C-17 Globemaster III aircraft on the flightline at Joint Base Andrews, Md., March 25, 2013, during a spring snowstorm. (U.S. Air Force photo/Staff Sgt. Brittany E. Jones)

Personnel at Joint Base Andrews, Md., continue flightline operations, March 25, 2013, despite a spring snowstorm forecasted to bring up to five inches of snow to the area. (U.S. Air Force photo/Staff Sgt. Brittany E. Jones)

Senior Airman Edwin Santos Limon, left, and Airman 1st Class Hayley Teehera, both with Joint Base Andrews, Md. Honor Guard, take a break to build a snowman, March 25, 2013. The spring snowstorm is forecasted to bring up to five inches of snow to the local area. (U.S. Air Force photo/Staff Sgt. Brittany E. Jones)

Airman 1st Class Hayley Teehera, Joint Base Andrews Honor Guard makes a snow man outside the honor guard building. March 25, 2013 at Joint Base Andrews, Md. Up to five inches of snow fell at JBA, marking the first major snowstorm of the year for the area.(U.S. Air Force photo/Staff Sgt. Perry Aston)

A snow covered Joint Base Lewis-Mchord C-17 Globemaster III, sits on the flightline Mar. 25, 2013 at Joint Base Andrews, Md. Up to five inches of snow fell at JBA, marking the first major snowstorm of the year for the area. (U.S. Air Force photo/Staff Sgt. Perry Aston)

De-icers remove snow and ice from a Joint Base Charleston C-17 Globemaster III from Mar. 25, 2013 at Joint Base Andrews, Md. Up to five inches of snow fell at JBA, marking the first major snowstorm of the year for the area.(U.S. Air Force photo/Staff Sgt. Perry Aston)

A crew chief for a C-17 Globemaster III from Joint Base Lewis-Mchord, walks on the fligh tline, Mar. 25, 2013 at Joint Base Andrews, Md. Up to five inches of snow fell at JBA, marking the first major snowstorm of the year for the area.(U.S. Air Force photo/Staff Sgt. Perry Aston)

A Snow sweeper from the 11th Civil Engineer Squadron removes snow off the flight line Mar. 25, 2013 at Joint Base Andrews, Md. Up to five inches of snow fell at JBA, marking the first major snowstorm of the year for the area. (U.S. Air Force photo/Staff Sgt. Perry Aston)

Airman 1st Class Lindsay Helbig, U.S. Air Force Honor Guard, ceremonial guardsman assigned to 11th Wing Protocol and Senior Airman Lauren Main, 11th Wing Public Affairs photojournalist make a snowman Mar. 25, 2013 at Joint Base Andrews, Md. Up to five inches of snow fell at JBA, marking the first major snowstorm of the year for the area. (U.S. Air Force photo/Staff Sgt. Perry Aston)

Airman 1st Class Lindsay Helbig, U.S. Air Force Honor Guard, ceremonial guardsman assigned to 11th Wing Protocol makes a snow angel outside of the Jones Building Mar. 25, 2013 at Joint Base Andrews, Md. Up to five inches of snow fell at JBA, marking the first major snowstorm of the year for the area. (U.S. Air Force photo/Staff Sgt. Perry Aston)

Tech. Sgt. Matthew Cain, 459th Aircraft Maintenance Squadron crew chief, starts a generator prior to completing pre-flight inspections on a KC-135 Stratotanker at Joint Base Andrews, Md., March 25, 2013. Personnel continue flightline operations despite a spring snowstorm forecasted to bring up to five inches of snow to the area. (U.S. Air Force photo/Staff Sgt. Nichelle Anderson)

Tech. Sgt. Matthew Cain, 459th Aircraft Maintenance Squadron crew chief dresses in layers to keep warm while working on the flightline at Joint Base Andrews, Md., March 25, 2013. Up to five inches of snow is expected throughout the day making this the heaviest snowstorm of the year. (U.S. Air Force photo Staff Sgt. Nichelle Anderson)

Personnel clear snow from the sidewalk at Joint Base Andrews, Md., March 25, 2013. The spring snowstorm is forecasted to bring up to five inches of snow to the local area. (U.S. Air Force photo/Staff Sgt. Nichelle Anderson)

Senior Airman Journey Henderson, 11th Security Force Squadron elite guard, checks identification cards as people enter Joint Base Andrews, Md., March 25, 2013. Defenders continue security operations despite a spring snowstorm forecasted to bring up to five inches of snow to the area. (U.S. Air Force photo/Staff Sgt. Nichelle Anderson)

Sgt. Matthew Cain, 459th Aircraft Maintenance Squadron crew chief, dusts snow off of a generator before conducting pre-flight checks on a KC-135 Stratotanker at Joint Base Andrews, Md., March 25, 2013. The spring snowstorm is forecasted to bring up to five inches of snow to the local area. (U.S. Air Force photo/Staff Sgt. Nichelle Anderson)

Personnel clear snow from the sidewalk at Joint Base Andrews, Md., March 25, 2013. The spring snowstorm is forecasted to bring up to five inches of snow to the local area. (U.S. Air Force photo/Staff Sgt. Nichelle Anderson)

Tech. Sgt. Matthew Cain, 459th Aircraft Maintenance Squadron crew chief, conducts a preflight checklist on a KC-135 Stratotanker, March 25, 2013 at Joint Base Andrews, Md. During inclimate weather conditions, maintainers take extra precautions when working on the flightline. (U.S. Air Force photo/Airman 1st Class Erin O’Shea)

Tech. Sgt. Matthew Cain, 459th Aircraft Maintenance Squadron crew chief, exits a KC-135 Stratotanker on March 25, 2013 at Joint Base Andrews, Md. Despite the cold weather conditions, Joint Base Andrews service members fulfill their mission essential tasks. (U.S. Air Force photo/Airman 1st Class Erin O’Shea)