TULKARM, West Bank - Israeli troops killed a top militant in the West Bank on Monday, while Gaza gunmen fired rockets toward Israel in a flare-up of violence that threatened to unravel an eight-month cease-fire. Israeli troops shot dead Islamic Jihad commander Loai Assadi during a raid in the West Bank city of Tulkarm. He was the most senior Palestinian militant to be killed since the start of the truce in March. Islamic Jihad gunmen in northern Gaza said they fired 25 rockets into Israel in retaliation, after declaring earlier in the day "let calm go to hell." The army...