r than in all of World War II. An estimated 800,000 tons of unexploded ordnance ??? known as UXO, and consisting of bombs, mines, munitions and other explosives ??? remain, afflicting a staggering 20 percent of the country, officials say.If true, that???s more than the 635,000 tons of bombs dropped by US forces in the Korean War.In Vietnam, US forces used more than 15 million tons of firepower ???