TEHRAN: Residents of Tehran awoke and went about their business as planned on Saturday after their sleep was troubled by Israeli strikes that triggered blasts that echoed across the city. The night skies had been criss-crossed by light trails from air defense weapons, but by mid-morning the capital had resumed its usual rhythm and buses wove through the streets, taking troubled Iranians to work. Iranian officials and media have played down the attack, but on the streets of Tehran many were concerned that it had marked a new escalation and a step toward all-out war.