Gunmen attack Tunis’ famed Bardo Museum

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)