Missile attacks in the Syrian capital, southern Lebanon, as well as Iraq and Yemen on Saturday threw into sharp focus the increasing risk of the war in Gaza triggering a wider regional conflict pitting Iran and its allies against Israel and the United States. Iran said five of its Revolutionary Guards were killed in a missile strike on a house in Damascus which it blamed on Israel, and security sources in south Lebanon said an Israeli strike there killed a member of Iran-backed Hezbollah. Later on Saturday, missiles and rockets launched by Iran-backed militants in Iraq, where such groups have …