5 Things to Know This Morning

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

1. The Biggest Moments From David Letterman's Final 'Late Show' Episode

David Letterman closed his 33-year late-night TV career Wednesday with a star-studded, emotional episode of “Late Show” that featured Jerry Seinfeld, Chris Rock, Tina Fey and a musical performance by the Foo Fighters.

The episode opened with a video clip from former Gerald Ford’s inaugural address: “Our long national nightmare is over,” Ford said. George Bush, Bill Clinton, George W. Bush and President Obama followed in pre-taped appearances to repeat Ford’s statement.

“Our long national nightmare is over – Letterman is retiring,” President Obama said. Letterman appeared next to him. “You’re just kidding, right?” Letterman said.

2. Washington DC Police Name Suspect in Fatal Mansion Fire

Police in Washington, D.C., named a suspect in a fatal mansion fire that killed four people last week.

The Metropolitan Police Department said officers were searching for Daron Wint, 34, after a court issued an arrest warrant charging him with "Murder One while Armed."

3. Sen. Rand Paul Ends Filibuster Against NSA's Controversial Data Collection Program After 10 Hours

Sen. Rand Paul, R-Kentucky, wrapped up his so-called "filibuster" over the National Security Agency's controversial bulk collection of Americans' phone records just before midnight Thursday.

Paul's talk-a-thon on the Senate floor lasted exactly 10 and a half hours.

"My voice is rapidly leaving, my bedtime has long since passed," Paul said as he began to wrap up his speech. "The bulk collection must end, and I think we have the votes to do it now."

4. Elian Gonzalez Opens Up About His Relationship With Fidel Castro

Fidel Castro made it his mission 15 years ago to return the young Elian Gonzalez to his father in Cuba after his mother died while trying to defect to the United States with the young boy.

In Cuba, Elian’s father Juan Miguel won the fight, backed by Castro, who donned gym shoes to personally lead the protests along Havana's Malecon.

Elian returned to Cuba a national -- but somewhat frightened -- hero, greeted by his elementary school classmates and a national TV audience.

5. Everything's Bigger in Texas: 46-Bedroom Mansion Hits the Market

Have you ever dreamed of owning a large mansion? Then look no further.

Here's a home with 46 bedrooms, 26 bathrooms and a nine car garage. And if you’re willing to shell out $3.5 million, then this large home, located at 2354 County Road 59 in Manvel, Texas, could be for you.