Olga Maltseva / AFP - Getty ImagesWar in UkraineMoscow attack suspects appear severely beaten as they're charged in Russian court
Sergey Guneev / Sputnik / Kremlin Pool via APISIS TerrorISIS claimed responsibility for Moscow massacre, but Putin points the finger at Ukraine
Joe Amon / Denver Post via Getty Images fileISIS TerrorColorado teen planned Middle East trip to help ISIS terrorists, prosecutors say
Ringo Chiu / AP fileISIS TerrorThe FBI is investigating asylum-seekers who entered the U.S. after help from a smuggler with ties to ISIS
Delil Souleiman / AFP via Getty Images fileISIS TerrorISIS says its leader was killed by militants in Syria and names successor
Visual Press Agency / ZUMAPRESS.comISIS TerrorNotorious British ISIS suspect found dead in Spanish prison
Ahmad Al-Rubaye / AFP via Getty Images fileISIS TerrorMichigan man gets 14 years in prison for fighting for Islamic State
Friedemann Kohler / picture alliance via Getty Images fileEXCLUSIVEArmed Russian jets have flown over a U.S. base in Syria nearly every day in March, U.S. commander says
Patrick Semansky / APISIS TerrorSupreme Court skeptical that Twitter bears responsibility for terrorist attack
Laura Lean / AFP - Getty ImagesISIS TerrorBritish-born woman who joined ISIS at 15 cannot regain her U.K. citizenship, court rules
Genaro Molina / Pool via APCal State via FacebookISIS TerrorSupreme Court wrestles with social media immunity in ISIS videos dispute
Bill Clark / CQ-Roll Call Inc. via Getty Images fileISIS TerrorU.S. military raid in northern Somalia kills a senior ISIS leader and 10 ISIS fighters
Delil Souleiman / AFP via Getty Images fileISIS TerrorSyrian rebels say anti-ISIS operations with U.S. have stopped, ISIS fighters may escape from prisons
Hussein Malla / AP fileISIS TerrorISIS 'Beatle' El Shafee Elsheikh sentenced to life for torturing and murdering American hostages
Christian Hartmann / Reuters fileParis Terror AttacksAmerican survivor of Paris terror attack speaks out after emotional testimony
Hussein Malla / AP fileISIS TerrorISIS 'Beatle' pleads guilty in U.S. court to helping torture, kill hostages, including Americans
AFP - Getty ImagesISIS TerrorBomb making equipment and Isis flag found during police raids in Denmark and Germany
Hussein Malla / APEXCLUSIVEISIS terrorists known as the 'Beatles' likely to be brought to U.S. in coming days
Reuters fileEXCLUSIVETwo of the ISIS terrorists dubbed the Beatles admit involvement in captivity of Kayla Mueller, James Foley
Zein al Rifai / AFP - Getty ImagesMideastTop special ops Marine who fought with Kurds blasts Trump move in Syria as betrayal
Reuters fileNational SecurityIntel officials say ISIS could regroup after U.S. 'betrayal' of Kurds in Syria
Geoffroy Van Der Hasselt / AFP - Getty Images fileEXCLUSIVEChaos in Syria, Washington after Trump call with Erdogan unleashed Turkish military
Delil Souleiman / AFP - Getty ImagesWorldU.S. exit from Syria could bolster ISIS threat, strengthen Iran, bipartisan report says
NBC San DiegoU.S. newsNavy SEAL accused of murdering teen ISIS fighter, using severed head during ceremony