By Caren Bohan WASHINGTON (Reuters) - The technology industry and organized labor are locked in a fight that threatens to complicate the U.S. Senate's immigration bill. At the heart of the debate is whether there is a shortage of Americans with the math and science skills needed for work at technology firms like Facebook Inc, Google Inc and Microsoft Corp. Labor is brandishing research that says the scarcity of workers is a myth while the tech industry is pointing to other studies that say the shortage is very real and is a threat to U.S. competitiveness. ...

SANTA CLARITA, Calif. (AP) — As firefighters took on a stubborn 3-day-old wildfire Friday in rough terrain north of Los Angeles, a second and more serious blaze broke out 30 miles away near Interstate 5, quickly surging to more than 500 acres, briefly threatening an elementary school and leading to the precautionary evacuation of nearly 20 homes.

ELIZABETH, N.J. (AP) — Two cups of coffee ended life on the run for an Internet sensation known as Kai the hatchet-wielding hitchhiker.

DOVER, Del. (AP) — A woman who lived with a Delaware pediatrician accused of waterboarding her 11-year-old daughter has agreed to plead guilty to child endangerment charges and testify against him.

FAIRFIELD, Conn. (AP) — Two commuter trains serving New York City collided in Connecticut during Friday's evening rush hour, sending 60 people to the hospital, including five with critical injuries, Gov. Dannel Malloy said.

By Keith Coffman DENVER (Reuters) - A group of Colorado county sheriffs, angry about two new state gun control laws passed in the wake of last year's mass shootings in Connecticut and Colorado, filed a federal lawsuit on Friday seeking to block the laws from going into effect. The two laws, passed by the state's Democratic-controlled legislature with scant Republican support, ban ammunition magazines that hold more than 15 rounds and require background checks for all private gun sales and transfers. All but 10 of the state's 64 county sheriffs signed on to the suit, filed in U.S. ...

Is Michael Phelps planning a comeback?

PITTSBURGH (AP) — The Ottawa Senators have plenty of respect for Sidney Crosby.

SANTA CLARITA, Calif. (AP) — As firefighters took on a stubborn 3-day-old wildfire Friday in rough terrain north of Los Angeles, a second and more serious blaze broke out 30 miles away near Interstate 5, quickly surging to more than 500 acres, briefly threatening an elementary school and leading to the precautionary evacuation of nearly 20 homes.

NEW YORK (AP) — Yahoo may be on the verge of closing its biggest acquisition during the 10-month reign of CEO Marissa Mayer as she tries to attract more traffic and advertisers to the Internet company's website and mobile applications.

UNITED NATIONS (AP) — North Korea is still trying to import and export nuclear and ballistic missile-related items but financial and trade sanctions are slowing progress on development of their prohibited weapons, U.N. experts say in a new report.

Ken Venturi, who overcame dehydration to win the 1964 U.S. Open and spent 35 years in the booth for CBS Sports, died Friday afternoon. He was 82.

ATLANTA (AP) — A metro Atlanta woman who lost both hands, her left leg and right foot after contracting a flesh-eating disease was on her way back from Ohio Friday after being fitted with prosthetic hands.

ATHENS, Ala. (AP) — A possible tornado has knocked down trees, flipped Dumpsters and damaged the roof of a nearby WalMart in a north Alabama city.

By Alexia Shurmur LAS VEGAS (Reuters) - An attorney who O.J. Simpson claims botched his Nevada robbery trial five years ago told a court on Friday that he poured his "blood, sweat and soul" into defending the former football hero, who he said had been badly tainted by his sensational 1990s murder case. Yale Galanter, who took the witness stand in a week-long hearing into Simpson's bid for a new trial in the Las Vegas case that sent him to prison, said his client's past had presented challenges in front of a jury. "Mr. Simpson brought a lot of baggage into the courtroom," Galanter testified. ...

CARACAS (Reuters) - Venezuela on Friday released an opposition activist who had been jailed on accusations of inciting violence in the wake of President Nicolas Maduro's narrow election victory in April. Retired General Antonio Rivero, who government critics described as the first political prisoner of Maduro's government, told a local television station he had been released after nearly three weeks in jail. "Right now I'm just going to focus on my health," Rivero, who had been on hunger strike during part of his detention, told the Globovision station. ...

GRANBURY, Texas (AP) — Residents whose homes were torn apart or blown away by a North Texas deadly tornado can soon return to retrieve what belongings may be left and start cleaning up, authorities said Friday.

LITTLE ROCK, Ark. (AP) — An Arkansas law banning most abortions 12 weeks into a woman's pregnancy won't take effect while a legal challenge is pending, a federal judge ruled Friday.

NECKER ISLAND, British Virgin Islands (AP) — Surrounded by a turquoise sea and a menagerie of exotic animals on a billionaire's private island, political and business leaders gathered Friday to back an initiative aimed at expanding protection for the Caribbean's imperiled coasts and waters.

(Reuters) - Former champion Keegan Bradley maintained a three-shot lead in Friday's second round of the Byron Nelson Championship in Irving, Texas after grinding his way to a one-under-par 69 in increasingly tricky conditions. Three ahead of the chasing pack overnight after opening with a blistering course record 60, Bradley had to contend with strengthening winds and firming greens at the TPC Four Seasons Resort Las Colinas en route to an 11-under total of 129. ...