Caffeine not strong enough for you? Try electricity. The U.S. Air Force is experimenting with electric brain stimulation on several dozen volunteers in the hopes it may improve alertness and acuity in personnel who must spend hours monitoring drone footage and surveillance data. The electricity created minor seizures in parts of the brain, which reduced fatigue in several subjects. In one case, a test subject kept awake for 30 hours said he felt "refreshed" after a jolt.