5 Things to Know This Morning

Jan. 20, 2014— -- Your look at the five biggest and most buzz-worthy stories of the morning.

1. Iran Starts Implementing Nuclear Deal

Iran halted its most sensitive uranium enrichment work on Monday as part of a landmark deal struck with world powers, easing concerns over the country's nuclear program and clearing the way for a partial lifting of sanctions, Tehran and the U.N. said.

2. Jailed American Appears Before Reporters in North Korea

An American missionary who has been jailed in North Korea for more than a year appeared before reporters Monday and appealed to the U.S. government to do its best to secure his release.

3. Richard Sherman Gets Loud

Seattle’s outspoken cornerback tipped a pass in the final seconds of Sunday’s NFC Championship game against the San Francisco 49ers, leading to a Seahawks interception – and sealing his team’s 23-17 win. He later taunted 49ers wide receiver Michael Crabtree – and berated him in a heated post-game interview. Sherman’s Seahawks will face off against the Denver Broncos in Super Bowl XLVIII.

4. Scientists Hope Comet-Chaser Spacecraft Wakes Up

Europe's Rosetta probe is due to wake up from years of hibernation Monday, but scientists face an agonizing wait of several hours until the first signal reaches Earth and they can celebrate a new milestone in their unprecedented mission to land a spacecraft on a comet.

5. Parades, Marches and Service Projects to Honor MLK

The nation paused to remember Martin Luther King Jr. Monday with parades, marches and service projects. King was born Jan. 15, 1929, and the federal holiday is the third Monday in January.