It took less than a minute for Israeli bombs to kill Iran's supreme leader, along with more than 40 senior figures, but according to people directly involved in the planning, the attack was three years in the making. As Matt Gutman reports, the big question now is who will lead Iran next.
In the week before an Iranian retaliatory strike that killed six U.S. service members, Iranian intelligence was likely able to identify and track American forces, according to a memo reviewed by CBS News.
