OBAMA-CUBA — President Barack Obama and Cuban President Raul Castro prod each other over human rights and the longstanding U.S. economic embargo during an unprecedented joint news conference that stuns Cubans unaccustomed to their leaders being aggressively questioned.

UNITED STATES-ISLAMIC STATE — The U.S. has set up a small Marine artillery outpost in northern Iraq to protect a nearby Iraqi military base, expanding the number and the combat exposure of American troops in the country. 

PRESIDENTIAL RACE — Donald Trump demands that his party's skeptical establishment embrace the inevitability of his presidential nomination, while Democrats launch a multi-pronged assault. 

PARIS-ATTACKS-MANHUNT — A keen-eyed witness who spotted a pale, slender figure fleeing an apartment in southern Brussels a week ago set in motion a police dragnet that in 72 hours led to the capture of Paris attacks suspect Salah Abdeslam, the most-wanted man in Europe. Another key helper for authorities was a pallbearer at the funeral of Abdeslam's brother. 

EUROPE MIGRANTS — Greek authorities detain hundreds of refugees and migrants on islands near Turkey as officials in Athens and the European Union concede a much-heralded international agreement on migration is facing delays. 

IRAQ-MILITIAS THREAT — Iraq's Shiite militias, mobilized in 2014 to fight the Islamic State group, now show no intention of standing down once the fight is over, demanding a major say in shaping Iraq's future. Some in the military and government fear that, left unchecked, the militias will seek to dominate Iraq the way the Revolutionary Guard does Iran and the Shiite guerrilla group Hezbollah does Lebanon. 

INTERNATIONAL COURT-CENTRAL AFRICAN REPUBLIC — The International Criminal Court convicts a former Congolese vice president of murder, rape and pillage for commanding troops who committed widespread atrocities in the Central African Republic in 2002-2003. 

MALI-ATTACK — Extremists launch an attack on the European Union military mission's headquarters in the Malian capital, underscoring their determination to continue striking against Western interests in the region. 

TWITTER TURNS 10 — Happy birthday, Twitter. The social media site famous for hashtags and a 140-character "tweet" limit turns 10 years old.