KIRYAT SHEMONA, Israel - U.N. observers in southern Lebanon called the Israeli military 10 times during a six-hour period to ask it to halt an airstrike before their observation post was hit, according to details of a preliminary U.N. report on the incident. Four U.N. observers were killed in the bombing Tuesday. During each phone call, an Israeli official promised to halt the bombing, according to a U.N. official who had seen the preliminary report, which was released to The Associated Press on Wednesday. The U.N. observers said the area within half a mile of the post was hit with...