OBAMA-EUROPE — President Barack Obama casts his decision to send 250 more troops to Syria as a move to keep up "momentum" against Islamic State extremists, and presses European allies to match the U.S. effort. 

PRESIDENTIAL RACE — Ted Cruz and John Kasich defend their extraordinary pact in three states as needed to stop Donald Trump, even as the GOP front-runner surges toward a big Northeast delegate haul in Tuesday's elections. 

OHIO SHOOTINGS — Four days after the calculated killings of eight people in rural Ohio, authorities have yet to publicly identify a motive, let alone any suspects, but the prosecutor reveals that extensive marijuana-growing operations were found at the scene. 

MEXICO-MISSING STUDENTS — The parents of 43 missing students who disappeared in September 2014 are accusing the government of lying to them, planting evidence and not adequately investigating the case. 

UNITED STATES-GEORGIA — Georgia's prime minister tells the AP his country will continue moving on a pro-Western course and pledges to hold an honest parliamentary election this fall. 

DUBAI DRIVERLESS CARS — Already home to the world's biggest skyscraper, Dubai wants to have 25 percent of all trips on its roads to be done by driverless vehicles by the year 2030.