PRESIDENTIAL RACE

COLUMBIA, South Carolina — After a week of bitter attacks, Republicans face off Saturday in South Carolina's presidential primary, a contest that could determine Donald Trump's strength as a front-runner and help clarify whether a more mainstream politician will ever emerge to challenge him. 

OBIT-HARPER LEE

NEW YORK — Harper Lee, the elusive novelist whose child's-eye view of racial injustice in a small Southern town, "To Kill a Mockingbird," became standard reading for millions of young people and an Oscar-winning film, has died. She was 89. 

SUPREME COURT-SCALIA

WASHINGTON — Bidding farewell to their longtime colleague, the eight remaining Supreme Court justices join family members, former law clerks and members of the public Friday in paying their respects to Antonin Scalia in a tradition-laden, solemn day at the marble courthouse atop Capitol Hill. 

ZIKA-VIRUS

SAO PAULO — Brazil's president, government ministers, state governors, health agents and members of the armed forces visit schools throughout the country to involve students in the nationwide campaign to eradicate the Aedes aegypti mosquito that spreads the Zika virus. 

MEXICO-DRUG LORD

MEXICO CITY — Lawyers for drug lord Joaquin "El Chapo" Guzman say he told them that guards at Mexico's Altiplano prison won't let him sleep, and that plans to make a movie about his life with actress Kate del Castillo are still on. 

HAITI-PROVISIONAL PRESIDENT

PORT-US-PRINCE, Haiti — Haiti's provisional president says he's committed to meeting deadlines that will ensure his caretaker government lasts for no more than 120 days to comply with a recently negotiated accord. 

ARGENTINA-DOLPHIN DEATH

BUENOS AIRES, Argentina— The apparent death of a baby dolphin after being passed around on an Argentine beach is creating a furor in the South American country.