A suicide attack that killed at least 142 pulls Yemen deeper into a region-wide fight, but an ISIS claim is doubtful.
Wednesday's attack in Tunisia heightened the European country's concern that it could be next.
ISIS recently seized control of at least two cities along Libya's Mediterranean coastline after taking territory in Syria and Iraq last year.
Two of the gunmen were killed by security forces during Wednesday's attack on the Bardo Museum in Tunis.
Tunisia's newly elected government needs assistance to fight terrorists, and will likely get it.
The Islamic State group has claimed responsibility for the terrorist attack at a Tunisia museum Wednesday that killed 21 people and injured dozens more.
Social media accounts affiliated with the Islamic State group shared a message that seemed to foretell the attack that killed 20.
The tourism minister said the country remained safe for travelers and denied reports of growing terrorism-related risks there.
The photos, whose authenticity has yet to be verified, show four black-clad men kneeling in an empty street somewhere in Salaheddin province.
Abu Zakariya al-Tunisi was wanted in Tunisia, his homeland, for assassinating two politicians in 2013.
Earlier this month, ISIS fighters reportedly demolished the site of Nimrud, the ancient Assyrian capital located 18 miles south of Mosul.
For the first time, forces aligned with Libya Dawn are battling ISIS militants in Sirte.
A bag of explosives went off at a checkpoint next to a Janzour security directorate building, west of Tripoli, wounding five policemen.
Clinton told a news conference on Tuesday her private email address was a "convenience" so she would not have to carry two mobile devices.
In an interview with U.S. Catholic website Crux, Archbishop Silvano Tomasi said the jihadists were committing "genocide" and must be stopped.
The exercises come days after President Obama issued a new round of sanctions against Venezuelan officials.
Four years after the Syrian Civil War began, the men who took up arms against Bashar Assad have been absorbed by extremist groups.
Closer ties to the Islamic State group will likely mean more foreign fighters and media savvy for the Nigerian terrorists.
The Islamic State group has a strict application process for jihadist militias pledging allegiance.
Gunmen allegedly aligned with ISIS kidnap nine, behead eight in oil field raid.
The Nigerian militant organization declared its allegiance to the Islamic State group on Saturday.
Former Secretary of State Colin Powell says he used personal email because the government communications system was antiquated.