See ISIS's Destruction of the Ancient City Palmyra

This undated photo released on Aug. 25, 2015 on a social media site used by Islamic State of Iraq and Syria (ISIS) militants shows smoke from the detonation of the 2,000-year-old temple of Baalshamin in the ancient caravan city of Palmyra, Syria.

This undated photo released on Aug. 25, 2015 on a social media site used by ISIS militants shows militants laying explosives in the 2,000-year-old temple of Baalshamin in Palmyra, Syria.

This undated photo released on Aug. 25, 2015 on a social media site used by ISIS militants, shows the 2,000-year-old temple of Baalshamin in Palmyra, Syria, rigged with explosives.

This undated photo released on Aug. 25, 2015 on a social media site used by ISIS militants shows the demolished 2,000-year-old temple of Baalshamin in Palmyra, Syria.