 Due to their higher flight altitude and nuclear payload, Strategic Air Command bombers were the primary object of the tests, but fighters, transport aircraft and even missiles were also tested for EMP hardness on Trestle.In addition to electronics survivability tests, numerous sensors located inside, beneath and to the sides of the aircraft would gather additional data on the airframe's EMP permeability to be used in design considerations for future Cold War aircraft and to identify areas which needed additional EM hardening.The advances made in EMP generation technology by Sandia during the operation of Trestle greatly assisted in the construction of the much more powerful 40 megavolt, 50 terawatt (50,000 gigawatt) Z Machine at Sandia during the 1990s.