SUKKARIYEH, Syria – Families in this Syrian village on Monday buried relatives they said died in a U.S. helicopter attack. A U.S. counterterrorism official said American forces killed the head of a Syrian network that funneled fighters, weapons and cash into Iraq. The raid Sunday targeted the home of Abu Ghadiyah, the nickname for the leader of a key cell of foreign fighters in Iraq, according to the U.S. official, who spoke on condition of anonymity to discuss sensitive intelligence. The U.S. Treasury Department has identified him as one of four major figures in al-Qaida's Iraq wing who were living...