[img]http://d.yimg.com/a/p/ap/20100420/capt.57bcccd55fde49a1bf03a5eb6ddc6624-57bcccd55fde49a1bf03a5eb6ddc6624-0.jpg?x=130&y=89&q=85&sig=I2_fUKdVCY11_3CLoZq8OQ--[/img]AP - Europe's busiest airport reopened Tuesday as air traffic across the continent lurched back to life. But the gridlock created by Iceland's volcanic ash plume was far from over: Officials said it would be weeks before all stranded travelers could be brought home.