A member of the Tunisian security forces stands guard as journalists gather at the National Bardo Museum in Tunis on March 19, in the aftermath of an attack on foreign tourists. (Fethi Belaid / AFP/Getty Images)
A unidentified relative of a victim of the attack, center, is escorted at the morgue of the Charles Nicolle hospital in Tunis, Tunisia, on March 19. (Michel Euler / Associated Press)
A member of the Tunisian security services stands guard in the National Bardo Museum, Tunis, Tunisia, on March 19. (Mohamed Messara / EPA)
A policeman guard the entrance of the Bardo Museum in Tunis, Tunisia, a day after gunmen opened fire, killing more than 20 people. (Christophe Ena / Associated Press)
Lebanese composer and musician Marcel Khalife visits the National Bardo Museum in Tunis, Tunisia, on March 19. (Mohamed Messara / EPA)
Tunisians in Tunis, the capital, hold candles and chant pro-government slogans on March 18 outside the National Bardo Museum, where gunmen killed at least 20 people. (Michel Euler / Associated Press)
A soldier stands guard outside the museum after the attack by militants. (Michel Euler / Associated Press)
Tourists are evacuated from the site of the attack. (Salah Habibi / AFP/Getty Images)
Security forces open a gate for an ambulance carrying wounded victims. (Fethi Belaid / AFP/Getty Images)
Security officers advance toward the Bardo Museum in response to an attack by gunmen that killed at least 21 people on March 18. (Fethi Belaid / AFP/Getty Images)
Tunisian security officers take up positions outside the Bardo Museum after gunmen opened fire inside, killing at least 20 people. (Mohamed Messara / EPA)
A plainclothes Tunisian policeman stops a photographer as security forces secure the area after gunmen attacked Tunis’ famed Bardo Museum. (Fethi Belaid / AFP/Getty Images)
Tunisian police in an armored vehicle move in to secure the area after gunmen attacked Tunis’ famed Bardo Museum. (Fethi Belaid / AFP/Getty Images)
Tunisian security forces move in to secure the area outside Tunis’ Bardo Museum after gunmen opened fire inside, killing at least 21, on March 18. (Fethi Beland / AFP/Getty Images)
Tunisian security officers take cover behind an armored vehicle outside Tunis’ Bardo Museum, where 21 people were killed when gunmen opened fire. (Mohamed Messara / EPA)
