BELGIUM ATTACKS — Belgium's interior minister and justice minister try to resign ahead of an emergency meeting of European security chiefs held amid growing questions about why authorities couldn't prevent deadly Islamic extremist attacks on Brussels despite increasing signs of a threat. 

ISLAMIC STATE — Syrian government forces push into the historic town of Palmyra where Islamic State militants appeared on the verge of collapse, while in Iraq, a military spokesman announces the start of a long-awaited military operation to recapture the IS-held northern city of Mosul. 

WAR CRIMES-KARADZIC — Serbs are in shock and Bosnian Muslims are celebrating after a U.N. war crimes court convicts former Bosnian Serb leader Radovan Karadzic of genocide and nine other charges and sentences him to 40 years in prison for orchestrating the worst carnage in Europe since World War II. 

PRESIDENTIAL RACE — Ted Cruz branded Donald Trump a "sniveling coward" as the feud between the Republican presidential contenders over their wives took a nastier turn. 

OBAMA-UNUSUAL WEEK — Dancing the tango, relaxing in the countryside, watching baseball with Cuba's Raul Castro — it's been an unusual week for President Barack Obama, whose Latin America tour left him on the periphery as the world grapples with terror attacks and other problems. 

EUROPE MIGRANTS — Poland's president throws his support behind a government decision to renege on a deal to accept thousands of refugees, blaming security concerns raised by Tuesday's attacks in Brussels. 

TURKEY-MEDIA UNDER SIEGE — Turkish authorities' seizure of an opposition newspaper this month and Friday's trial of two journalists are the latest step in the government's increasingly bold moves against media freedoms.