Sen. Ted Cruz (R-TX) is raising concerns that a nuclear-armed Iran could easily kill millions of Americans with a surprise attack on the U.S. electric grid, one of a handful of worries the Pentagon has recently focused on.

Cruz, who supports President Donald Trump’s embrace of Israel’s military campaign to stop Iran’s nuclear weapon and ballistic missile programs, warned that the terrorist nation could launch a simple nuclear-armed satellite, fly it over the East Coast, and hit the detonate button as it passes over the electric grid, frying it in an electromagnetic pulse attack.