text:  Much of Israel's commercial capital, Tel Aviv, has returned more or less to business as usual. The heavy rocket fire the city faced last fall in the early days of the Gaza war ended months ago. But the sense of normality was shattered in a deadly pre-dawn explosion Friday that rocked Tel Aviv's oceanfront. For details, NPR's Greg Myrie joins us from Tel Aviv. Hey, Greg. Hi, Scott. What can you tell us about this attack?