Kerry said: "We are uniting the world against a unified threat, and the president's strategy will succeed because doing it with allies and partners isn't just smart, it's strong."
Meanwhile, a series of attacks, mainly car bombings targeting security forces and markets, killed and wounded dozens of people on Wednesday in Iraq's capital, authorities said.
OneIndia news brings to you news from across the world in pictures.
Sushma Swaraj visits Afghanistan
Indian Foreign Minister Sushma Swaraj is welcomed by Afghan officials during a ceremony to raise the largest Afghan flag to fly in the country, on the Wazir Akbar Khan hilltop in Kabul, Afghanistan. Swaraj visited the country on Wednesday.
Double car bomb attacks rocks Baghdad
Firefighters look for survivors as people inspect the aftermath of a double car bomb attack at a busy market in Ghadeer district in southeastern Baghdad, Iraq.
John Kerry meets Iraqi President
Iraqi President Fouad Massoum and U.S. Secretary of State John Kerry wait for a meeting in Baghdad, Iraq.
Repairing a wind turbine
Industrial climber Torsten Kuehne repairs a wind turbine about 60 meters high in Wulkow, eastern Germany. He is secured by two lines to repair damage on the 44 meter long rotor blades.
Bratwurst on a grill
Mabel and Larry Schubert help lay out a 100 foot-long bratwurst on a grill at the Silver Creek Saloon in Belleville, Illinois.