By Ian Simpson and Alice Mannette MOORE, Oklahoma (Reuters) - Rescue workers with sniffer dogs and searchlights picked through the wreckage of a massive tornado to ensure no survivors remained buried in the rubble of primary schools, houses and buildings in an Oklahoma City suburb. The massive tornado on Monday afternoon flattened entire blocks of the town, killed at least 24 people and injured about 240 in Moore, Oklahoma. ...

MIAMI (Reuters) - An FBI agent shot and killed a Florida man with suspected links to the Boston Marathon bombings early on Wednesday, NBC News reported. NBC said the suspect was being questioned and was originally cooperative, but was fatally shot after attacking the agent. The Orlando Sentinel said a friend had identified the dead man as 27-year-old Ibragim Todashev of Orlando. The newspaper quoted the friend, Khusn Taramiv, as saying Todashev was being investigated as part of the Boston bombings and knew bombing suspect Tamerlan Tsarnaev because both were mixed martial-arts fighters. ...

By Edith Honan NEW YORK (Reuters) - Two years after resigning from Congress in a lewd photo scandal, former U.S. Representative Anthony Weiner announced in a video message early on Wednesday he is running for New York City mayor. "I made some big mistakes and I know I let a lot of people down, but I also learned some tough lessons," Weiner said in the video. "I'm running because I've been fighting for the middle class and those struggling to make it my entire life. ...