JERUSALEM, Dec. 2 - Israel conducted a successful test of its missile-interception system today, shooting down an incoming missile intended to simulate those in Iran's arsenal, the Defense Ministry said. The test came a day after Israel's prime minister, Ariel Sharon, said that Israel could not accept an Iran with nuclear weapons. In the latest test of the Arrow antimissile system, an Israeli aircraft over the Mediterranean Sea fired a missile on a trajectory designed to emulate an Iranian Shahab-3. From an air force base in central Israel, an Arrow missile was launched and destroyed the incoming missile, according to...