With Operation Popeye, the U.S. government made weather an instrument of war

As geo-engineering projects soar, the declassified project is newly relevant. Troops wade through a river in Vietnam. Wikimedia Commons It was a seasonably chilly afternoon in 1974 when Senators Claiborne Pell, a Democrat from Rhode Island, and Clifford Case, a Republican from New Jersey, strode into the chambers of the Senate Committee on Foreign Relations for a classified briefing.