Senator Marco Rubio (R-Fla.) said outgoing Secretary of State Hillary Clinton should testify before the Senate Foreign Relations Committee about the Sept. 11 attack on the U.S. diplomatic mission in Benghazi, Libya, to “explain why her department failed.”

In an editorial published on Wednesday, Rubio said the State Department Accountability Review Board (ARB) report released last week “concisely lays out much that we already knew” about the attack that killed four Americans, including U.S. Ambassador Christopher Stevens.