Inside Operation Barrel Roll, a covert US military campaign that dropped 2 million tons of bombs on Laos over 9 years

• For nine years, a covert CIA-run operation called "Operation Barrel Roll" dropped more than 580,000 bombs on Laos.
• The US was trying to stop North Vietnamese forces from transporting weapons and soldiers through Laos.
• But the bombs' impact continued long after an estimated 80 million bombs were dropped but failed to detonate.

Between 1964 and 1973, the US dropped about 2 million tons of bombs on Laos in a covert campaign known as"Operation Barrel Roll."