A reactor in Tehran is a monument to the U.S. relationship with Iran when the country was led by a secular, pro-Western monarch.

Analysts seek clues through satellite imagery, but beyond large holes and evidence of discoloration, comprehensive conclusion of strike success proves elusive for now.

Ballistic experts say it's too soon to determine how much damage Iran's nuclear facilities sustained in the weekend attack. On Saturday night, the United States targeted nuclear sites in Iran believed to be essential to the country's ability to produce nuclear weapons: a uranium enrichment site located in northwestern Iran -- deep inside a mountain in Fordo -- along with another uranium enrichment site in Natanz and the Isfahan Nuclear Technology Center,