Tunisians celebrate the fifth anniversary of the Arab Spring on Thursday in Tunis. Riadh Dridi/AP hide caption
Tunisia
Police officers take positions as they arrive at scene of a bus explosion in the center of Tunis, the capital city of Tunisia, Tuesday. Hassene Dridi/AP hide caption
December 2013: A Tunisian boy waves a flag as he runs at a rally in Tunis, marking the third anniversary of Tunisia's revolution. A prominent member of the group that's credited with averting civil war in the country says the group acted "to give hope to young people." Zoubeir Souissi /Reuters /Landov hide caption
How Tunisia's 'Quartet' Saved A Country From Civil War And Won The Nobel Peace Prize
Tunisia's National Dialogue Quartet, represented here at a news conference in 2013, won the Nobel Peace Prize on Friday for the group's contribution to building democracy after the Jasmine Revolution in 2011. Anis Mili/Reuters /Landov hide caption
In Kairouan, Tunisia, Muslims visit the Great Mosque, one of the oldest and best-known mosques in North Africa. Tunisia has made more political progress than other Arab Spring countries, but it has suffered two major terror attacks in recent months. Anadolu Agency/Getty Images hide caption
Tunisian President Beji Caid Essebsi speaks during a forum on strategic planning, in Tunis, in June. Essebsi has declared a state of emergency his office says is aimed at dealing with the threat of Islamist extremists. Mohamed Messara/EPA/Landov hide caption
Police patrol the beach at Sousse, Tunisia, on Sunday. Tunisian authorities have deployed additional security forces, closed some mosques and banned some Islamist groups in the wake of Friday's terrorist attack at a beachfront hotel. Abdeljalil Bounhar/AP hide caption
This image, which is taken from a website associated with the self-declared Islamic State, purports to show Tunisian gunman Seifeddine Rezgui. AP hide caption
The body of a tourist lies near a beachside hotel in Sousse, Tunisia. Dozens of people were killed Friday when at least one gunman opened fire at the hotel, an interior ministry spokesman said. Amine Ben Aziza/Reuters/Landov hide caption
Survivors are escorted from the National Bardo Museum in Tunis on Wednesday. At least 20 foreign tourists were killed in the attack. Mohamed Krit/Barcroft Media/Landov hide caption
Tunisian security forces secure the area after gunmen attacked Tunis' famed National Bardo Museum on Wednesday. Fethi Belaid/AFP/Getty Images hide caption
A supporter of newly elected Tunisian presidential candidate Beji Caid Essibsi flashes the V-sign from a car as they celebrate the first results of the Tunisian elections in Sousse, Tunisia. STR/EPA /LANDOV hide caption
Tunisian voter Dina Ghlisse, 19, displays her finger with the indelible ink mark after voting in La Marsa, on the outskirts of Tunis, on Sunday. More than three years after Tunisia sparked the Arab Spring, the country is choosing a president. Hassene Dridi/AP hide caption
A woman votes in the first round of the Tunisian presidential election on Nov. 23. The election went smoothly, but no candidate won 50 percent of a vote, forcing a runoff between the top two on Sunday. Hassene Dridi/AP hide caption