Israel stunned Iran last week with an intelligence and military operation years in the making that struck high-level targets with precision.

Israel had spent months smuggling in parts for hundreds of quadcopter drones rigged with explosives—in suitcases, trucks and shipping containers—as well as munitions that could be fired from unmanned platforms,

Covert operations by Mossad preceded Israel's strikes targeting Iran's nuclear weapons program, escalating tensions in the region.