rome italy give support u.s. air strike syrian airfield friday say suitable response syrian aggression deterrent use chemical weapons leader bashar al-assad unite state fire dozens cruise missiles syrian air base early friday say deadly chemical weapons attack launch week italy understand reason u.s. military action foreign minister angelino alfano say statement strike commensurate response ... signal deterrence risk use chemical weapons assad italy currently hold rotate presidency group seven industrialize nations italy two large opposition party anti-establishment 5-star movement anti-immigrant northern league condemn u.s. strike italy say support u.s. strike syria