Tens of thousands of 'trucker bombs' litter roads --- SEATTLE — Roadside litter comes in all shapes and sizes — from dirty diapers to syringes — but there's one category that out-grosses the rest: trucker bombs. Most drivers whiz along the nation's highways largely oblivious to their roadside surroundings. But next time you are out there, take a closer look. "As soon as you look for it you’ll see it," says Megan Warfield, litter programs coordinator at Washington state's Department of Ecology. "You just see them glistening in the sun. It’s just gross." They are trucker bombs, plastic jugs full...