TOP STORIES:

UNITED STATES-IRAQ

WASHINGTON — President Barack Obama authorizes U.S. airstrikes in northern Iraq, warning they would be launched if needed to defend Americans from advancing Islamic militants and protect civilians under siege. His announcement threatens a renewal of U.S. military involvement in the country's long sectarian war. By Julie Pace and Robert Burns.

AP Photos.

TENNESSEE PRIMARY

WASHINGTON — The conservative tea party movement tries and fails to knock incumbent Tennessee Republican Sen. Lamar Alexander off the ballot in November's congressional elections, continuing unsuccessful attempts in five other states. By Steven R. Hurst.

AP Photos.

CAMBODIAN AMERICANS-VERDICT

SANTA ANA, California — Sophany Bay saw her two young daughters and son die at the hands of the infamous Khmer Rouge in Cambodia after the family was forced from their home and she was sent to toil in the fields under the movement's reign of terror. By Amy Taxin.

AP Photo.

ARGENTINA-DIRTY WAR CHILDREN

BUENOS AIRES, Argentina — A judge is seeking to question the man revealed this week to be the long-lost grandson of a human rights activist whose daughter was captured and killed during Argentina's "dirty war," an official says. By Almudena Calatrava.

AP photos.

TROPICAL WEATHER

HONOLULU — Hurricane Iselle's outer edges brought rain and wind to Hawaii early Friday as it was poised to become the first hurricane or tropical storm to hit the island chain in 22 years. Another hurricane closely followed. By Jennifer Sinco Kelleher and Audrey McAvoy.

AP Photos, video.

COLOMBIA-PRESIDENTIAL INAUGURATION

BOGOTA, Colombia — President Juan Manuel Santos takes the oath for his second term and promises to redouble his efforts to end Colombia's half-century war amid a renewed wave of rebel violence that has put peace talks at risk. By Joshua Goodman.

AP photos.

PORCH SHOOTING

DETROIT — A jury convicts a man of second-degree murder and manslaughter after he shot an unarmed young woman in the face on his porch last year after she pounded on his door. It rejected his claim that he was afraid for his life and had acted in self-defense. By Ed White.

AP Photos.

DOZIER BOYS SCHOOL

TAMPA, Florida — A boy who was buried at a reform school with a history of unsanitary and decrepit conditions was for the first time positively identified among the scores of remains that were found in unmarked graves, researchers say. By Jared Leone.

BUSINESS:

GENERAL MOTORS-TRIPLE RECALL

UNDATED — General Motors' troubles with safety recalls has surfaced in another case, this time with the company recalling a group of SUVs for a third time to fix power window switches that can catch fire. By Tom Krisher.

LULULEMON TRUCE

UNDATED — Lululemon Athletica founder Dennis "Chip" Wilson will sell half his stake in the company as part of a truce that averts a potentially messy battle at the maker of yoga apparel and other exercise gear.

ARTS AND ENTERTAINMENT:

THEATER-FUN HOME

NEW YORK — Broadway musicals aren't often set in funeral homes, but one is about to — "Fun Home." Producers of the offbeat but moving and refreshing show say they will mount the musical this spring at the Circle in the Square Theatre. By Mark Kennedy.

AP Photo.