The Hawaii Air National Guard [HIANG] demonstrated the use of alternative energy to tow a KC-135 Stratotanker. A U-30 Aircraft Tow Tractor retrofitted with hydrogen fuel cells was used to tow the 186,000 pound aircraft on the flightline of Joint Base Pearl Harbor-Hickam and demonstrate the efficacy of the technology, showing one way the U.S. Air Force could incorporate the use of renewable energy in conducting operational missions while lessening its dependency on fossil fuels.