PRESIDENTIAL RACE-REPUBLICAN DEBATE

NORTH CHARLESTON, South Carolina — Billionaire businessman Donald Trump doubles down on his questions about Texas Sen. Ted Cruz's eligibility to serve as president, telling his rival that his birth in Canada leaves "a big question mark on your head." 

VISA FRAUD-TOWN'S FALLOUT

PORT ST. LUCIE — A visa program that gives overseas investors permanent U.S. residency in exchange for a job-creating investment of $500,000 to $1 million apiece has become a target for fraudsters, who bilk wealthy foreigners and leave needy U.S. communities in the lurch. 

IRAN-US NAVY BOATS

TAMPA, Florida — Defense Secretary Ash Carter says it appears a navigational error caused the crews of two Navy boats to stray into Iranian waters in the Persian Gulf, where they were detained overnight by Iran and released. 

POWERBALL JACKPOT

MUNFORD, Tennessee — An unprecedented $1.6 billion Powerball jackpot that became a national fascination will be split three ways, by mystery winners in Florida, Tennessee and California. 

GUANTANAMO-PRISONER RELEASE

MIAMI — Ten prisoners from Yemen who were held at Guantanamo Bay, Cuba, have been released and sent to the Middle Eastern nation of Oman for resettlement, officials say, portraying it as a significant milestone in the long-stalled effort to shutter the detention center. 

GUATEMALA-NEW PRESIDENT

GUATEMALA CITY — TV comic and political neophyte Jimmy Morales is sworn in as Guatemala's president amid uncertainty over how he plans to run the Central American nation beset by entrenched poverty, rampant corruption and violent criminal gangs.