Operation Popeye: weaponized weather during Vietnam War

"He claimed the US government had a proven history of using the weather in a hostile way, citing the action of seeding clouds during the Vietnam War to muddy the Ho Chi Minh foot-trail and attempt to cut it off, as it was used as a supply route but the north Vietnamese. He claimed the CIA had also seeded clouds over Cuba “to make it rain and ruin the sugar harvest”."