Updated: 6:27 AM - The National Weather Service says the tornado that hit Moore, Okla., was a top-of-the-scale EF-5 twister with winds of at least 200 mph.

Updated: 05/21/2013 - President Barack Obama pledged urgent government help for Oklahoma Tuesday in the wake of "one of the most destructive" storms in the nation's history.

Updated: 05/21/2013 - Death toll revised down to 24 but likely to rise as rescuers sift through area savaged by mammoth twister; at least 7 kids killed

Updated: 05/21/2013 - For many families in Moore, the ordeal ended in bear hugs and tears of joy. Others were left to wait in the darkness, hoping for good news while fearing the worst.

Posted: 05/21/2013 - Police in Nashville say Texas state troopers and deputy U.S. marshals have arrested a homicide suspect in Lyford, Texas.

Posted: 05/21/2013 - After nearly five months of testimony in a case that has captured tabloid headlines with tales of sex, lies and violence, Arias' final words to the jury will soon bring the trial to an end.

Posted: 05/20/2013 - The Long Island college student was being held in a headlock by a masked intruder with a loaded gun to her head, police said. Then the gunman took aim at an officer.

Posted: 05/20/2013 - A Department of Veterans Affairs accounting released in response to inquiries from The Associated Press shows a heavy financial and emotional cost involving vets from Iraq, Afghanistan and even back to Vietnam.

Posted: 05/20/2013 - The Senate Judiciary Committee is aiming this week to pass a landmark immigration bill to secure the border and offer citizenship to millions, setting up a high-stakes debate on the Senate floor.

Posted: 05/20/2013 - Several tornadoes struck parts of the nation's midsection Sunday, concentrating damage in central Oklahoma and Wichita, Kan.

Posted: 05/20/2013 - Emergency responders found the body of a Dallas firefighter trapped while battling a blaze at a condominium complex.

Posted: 05/20/2013 - It could be an anxious wait of up to two months for people in a small Florida city to find out who won the highest Powerball jackpot in history: an estimated $590.5 million.

Posted: 05/20/2013 - "Star Trek: Into Darkness" has warped its way to a $70.6 million domestic launch from Friday to Sunday, though it's not setting any light-speed records with a debut that's lower than the studio's expectations.

Posted: 05/20/2013 - Two FBI special agents on the agency's elite Hostage Rescue Team have been killed in a training accident in Virginia, officials said Sunday.

Updated: 05/19/2013 - Witnesses described a frantic scene and close calls after an elderly driver plowed into dozens of hikers marching in a small Virginia mountain town's parade.

Posted: 05/19/2013 - A lottery official says 1 winning ticket has been sold in Florida for a record Powerball jackpot of more than $590 million.