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In this Friday, Feb. 19, 2016 photo, people gather after an air strike on a house and training camp belonging to the Islamic State group, west of Sabratha, Libya. American F-15E fighter-bombers struck an Islamic State militant training camp in rural Libya near the Tunisian border Friday, killing dozens, probably including an IS operative considered responsible for deadly attacks in Tunisia last year, U.S. and local officials said. (AP Photo/Mohamed Ben Khalifa)

In this Friday, Feb. 19, 2016 photo, people gather after an air strike on a house and training camp belonging to the Islamic State group, west of Sabratha, Libya. American F-15E fighter-bombers struck an Islamic State militant training camp in rural Libya near the Tunisian border Friday, killing dozens, probably including an IS operative considered responsible for deadly attacks in Tunisia last year, U.S. and local officials said. (AP Photo/Mohamed Ben Khalifa)