Jordan confirms its air force joined U.S. strikes on Islamic State targets in Syria. The U.S. launched these strikes on Friday to retaliate for the killing of three U.S. citizens by a Syrian gunman earlier this month. Jordan's military says its air force targeted several ISIS positions in southern Syria. The Syrian Observatory for Human Rights reports at least five people were killed, including an IS cell leader. The operation aims to prevent extremist groups from threatening regional security. U.S. Central Command says the strikes hit over 70 targets across central Syria, with Jordanian support.