TEHRAN/WASHINGTON, June 27 (Xinhua) -- The U.S. airstrikes on Iranian military sites Friday, after accusing Iran of attacking a commercial vessel transiting the Strait of Hormuz Thursday, put the fragile ceasefire agreement to the test. Ebrahim Azizi, head of the Iranian parliament's national security and foreign policy committee, said U.S. President Donald Trump has shown "no commitment" to the principles of neg