JERUSALEM (AP) - Israel will demand that U.N. investigators who arrived in Israel on Wednesday determine whether the world body employs people who "aid and abet" Palestinian militant groups, a senior Israeli official said. U.N. Secretary-General Kofi Annan sent the team this week after Israel claimed a Palestinian rocket had been transported in a U.N. ambulance. Although Israel has since backtracked on that claim, it insisted Wednesday that U.N. employees in the West Bank and Gaza Strip assist militants in carrying out attacks. Israeli-U.N. relations have been strained for years, with Israel repeatedly accusing the world body of bias. The...