In the late '60s and early '70s, the US military tried something it hasn't repeated since; Operation Popeye - what was it?

Can you weaponize the weather? The U.S. military actually tried. During the Vietnam War, a top-secret mission named Operation Popeye used cloud seeding over the Ho Chi Minh Trail. Planes dropped silver iodide to trigger relentless monsoons and drown enemy supply lines in mud. Here is how weather modification became a real weapon, and why world leaders banned it.