article_snippet: On March 18, the art, culture and history museum was the site of a drastically different scene, as gunmen opened fire on tourists in a siege that also forced the evacuation of the neighboring Parliament.
article_snippet: ISIS claimed responsibility for the attack in an audio message posted online the next day.
article_snippet: Hours before Sunday's demonstration began, Tunisia's Prime Minister announced that Algerian national Khaled Shayeb, the alleged architect of the museum assault, was one of nine suspected militants killed in a raid in the south of Tunisia.
article_snippet: CNN's Catherine E. Shoichet contributed to this report.