A B-52 bomber sits atop the TRESTLE electromagnetic pulse (EMP) simulator at Kirtland Air Force Base, New Mexico. The facility is the largest wood-and-glue laminated structure in the world. Aircraft tested here are subjected to up to 10 million volts of electricity to simulate the effects of a nuclear explosion and 
assess the "hardness" of electrical and electronic equipment to the EMP pulse generated by a nuclear burst.