Sri Lanka stopped bombing Tamil Tiger targets and reopened borders with rebel territory on Thursday but a fragmentation mine blast killed two sailors, police said, as the island teetered on the brink of war. Both sides have vowed to retaliate if attacked again after heavy firing on Tuesday night and on Wednesday caused thousands to flee their homes and raised fears a 2002 ceasefire could collapse. If violence stops, diplomats say peace talks might still be possible. But if it resumes, they fear a return to a two-decade-old civil war that has already killed more than 64,000. Full Story