5 Stories You May Have Missed This Weekend

— -- 1. Bill Clinton Says He's Leaving It 'All on the Floor' in Iowa

In the final sprint before the Iowa Caucuses, President Bill Clinton said it "feels good" in Iowa as he and Hillary Clinton campaigned hard in the last push before Monday.

"You just want to know you left it all on the floor, and I think we did," the former president told ABC News.

"We've had a chance to get her message out. I feel good about it but you don't know what's going to happen," Bill Clinton said, noting Iowa's history of unpredictability when it comes to choosing who wins the state's caucuses.

2. U.S. Navy Destroyer Sails Near Disputed Island in South China Sea

A U.S. Navy destroyer sailed within 12 nautical miles of Triton Island Saturday, an island claimed by China in the Paracel Islands chain in the South China Sea.

The Pentagon said the warship’s passage was a freedom of navigation operation intended to “challenge excessive maritime claims of parties that claim the Paracel Islands,” which are also claimed by Vietnam and Taiwan.

The destroyer USS Curtis Wilbur (DDG 54) “transited in innocent passage within 12 nautical miles of Triton Island,” said Department of Defense spokesman Mark Wright. There were no Chinese Navy vessels in the vicinity at the time of the Curtis Wilbur’s transit.

"This operation challenged attempts by the three claimants, China, Taiwan and Vietnam, to restrict navigation rights and freedoms around the features they claim by policies that require prior permission or notification of transit within territorial seas," Wright said. "The excessive claims regarding Triton Island are inconsistent with international law as reflected in the Law of the Sea Convention."

None of the three countries were notified by the U.S. of the destroyer’s transit, "which is consistent with our normal process and international law," said Wright.

3. Motorcycle Club Fistfight Leads to Fatal Shooting at Denver Expo, Cops Say

A fistfight between members of two "motorcycle clubs" at the National Western Stock Show in Denver Saturday escalated into an incident that left four people shot -- one fatally -- another stabbed and three others injured, police said.

The incident occurred at the first day of the Colorado Motorcycle Expo. The second day of the show, which was supposed to continue Sunday, was cancelled.

Denver Police Chief Robert White said no one has been arrested, but police were speaking to a "person of interest."

"We are interviewing several witnesses and we do have one person of interest who we will be interviewing also," he said.

4. Children Mourn Beloved Elementary School Principal Who Saved Students in Bus Crash

More than 1,000 mourners, including children, gathered Saturday for the funeral of a beloved Indiana elementary school principal who died after jumping in front of a bus to protect young students.

Susan Jordan, the longtime principal at Amy Beverland Elementary School, died Tuesday after being hit when a bus lurched onto the curb outside of the school, authorities said. Two 10-year-old students were also hit, and they were hospitalized with serious but non-life threatening injuries.

The bus driver said that she saw Jordan push students out of the way before being hit, Indianapolis Fire Department Capt. Rita Teith told ABC News.

5. 'Fireball Meteor' Caught on Camera in Virginia and Ohio

A number of witnesses across the Northeast U.S. observed a fireball, otherwise known as a very bright meteor, flying through the sky at approximately 6:16 p.m. Saturday evening.

Alex Salvador was driving in Falls Church, Virginia, when he spotted the fireball and was able capture it on his dashcam.

"Startling. Even unnerving, maybe," Salvador told ABC News of the sighting. "It seemed close, big, and definitely on fire with a tail."

Adrian Burns got video footage of the fireball while driving in Lancaster, Ohio.

Many people flocked to the American Meteor Society website to report their sightings and observations. Observers described the fireball as having colorful fragments and looking like it "fell apart or exploded."