MIAMI - Investigators on Friday released a scientist detained at Miami International Airport after screeners spotted a metal canister in his luggage that looked like a pipe bomb, prompting an evacuation, a senior law enforcement official said.

The official told The Associated Press that no charges were filed against the 70-year-old man and he was allowed to continue his trip.

He is an American citizen and was "very cooperative," FBI agent Michael Leverock said at a news conference in Miami.

NEW YORK - Ben Roethlisberger's suspension has been cut from six games to four by NFL Commissioner Roger Goodell.

The Pittsburgh Steelers' star quarterback met with Goodell early Friday and was told he could return on Oct. 17 against Cleveland.

Roethlisberger was suspended in April for violating the league's personal conduct policy, but Goodell said at the time he would review the player's behavior over the next few months.