Tech. Sgt. Michael Anderson, left, and Airman 1st Class Zachery Hatfield, both technicians assigned to the 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration shop, check the voltage of a cooling unit at the 99th CES compound on Nellis Air Force Base, Nev., July 7, 2015. Anderson was training Hatfield on how to use and read a meter checking for voltage. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
Tech. Sgt. Michael Anderson, 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration craftsman, prepares to check the voltage on an A/C unit at the 99th CES compound on Nellis Air Force Base, Nev., July 7, 2015. The meter measures temperature, micro amps and more, and also has a function that helps prevent false readings. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
Tech. Sgt. Michael Anderson, left, and Airman 1st Class Zachery Hatfield, both technicians assigned to the 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration shop, place a panel back onto an A/C unit at the 99th CES compound on Nellis Air Force Base, Nev., July 7, 2015. HVAC/R technicians are responsible for maintaining mechanical, electronic and pneumatic controls associated with refrigeration and cooling equipment. (U.S. Air Force photo by Staff Sgt. Victoria Sneed)
Tech. Sgt. Michael Anderson, 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration craftsman, works to remove an A/C filter at the Nellis Inn on Nellis Air Force Base, Nev., July 8, 2015. Filters are changed regularly as part of preventive maintenance. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
Airman 1st Class Zachery Hatfield, 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration journeyman, checks the settings on a boiler at the Nellis Inn on Nellis Air Force Base, Nev., July 8, 2015. This boiler is used to heat the air and water in the building. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
Airman 1st Class Zachery Hatfield, 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration journeyman, removes a part to repair a fan at the 99th CES compound on Nellis Air Force Base, Nev., July 8, 2015. This fan helps move the air around the inside of a building to keep the dorm occupants comfortable. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
Tech. Sgt. Michael Anderson, 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration craftsman, pulls apart a fan assembly at the 99th CES compound on Nellis Air Force Base, Nev., July 8, 2015. The HVAC/R flight is responsible for maintenance, repair, operation and installation of mechanical equipment associated with heating, ventilation, air conditioning, and refrigeration systems. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
Tech. Sgt. Michael Anderson, right, and Airman 1st Class Zachery Hatfield, both technicians assigned to the 99th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration shop, work together to take apart a fan at the 99th CES compound on Nellis Air Force Base, Nev., July 8, 2015. The HVAC/R flight maintains approximately 2.5 billion British thermal unit physical plants on base. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
New commander takes helm of 99 MDG
Col. Jeff Simmons assumes command of the Nevada Test and Training Range
U.S. Air Force Weapons School celebrates Class 26-A graduation
Rescue mission highlights readiness of 34 WPS, 355 AMXS
Brig. Gen. Sullivan relinquishes command of the 57th Wing
