10:20 p.m. Greg Redfern, NASA Solar System Ambassador
Fireball, not a meteor, caused March Madness in the sky Friday night
6:50 p.m. Scott Greenberg, wine columnist
The offerings of local wine distributor Gus Kalaris
5:50 p.m. Bill Carter, New York Times television reporter
Grooming Fallon to replace Leno
Read Carter's story about the possible late night switch up here.
4:50 p.m. Susan Carey, Wall Street Journal reporter
FAA cuts, furloughs and affect on airlines
4:20 p.m. Chris Wallace, Fox News Sunday host
President Obama's trip to Israel, Jordan
3:50 Ann Hornaday, Washington Post film critic
"Olympus Has Fallen" is "Die Hard" in the White House
3:20 Gwen Ifill, moderator of Washington Week
President Obama speaks from Jordan
2:20 Sally Jenkins, columnist, Washington Post
Emotional project: Co-author of "Sum It Up" with Pat Summit
1:50 p.m. Clinton Yates, Express Local News Editor and Columnist for The Root DC
NCAA Brackets: No one cares about your picks
Related link: ‘NCAA Tournament Brackets? No, thank you.'
Dave Ross, commentator
When hospitals make you sicker
11:20 a.m. - J.J. Green, WTOP's national security correspondent
How good are drones used in the military today?
Save money by being an adventurous traveler
Do you need to give your ZIP code when paying by credit card?
WTOP's Del Walters reports.
9:20 a.m. - Dr. Sanjay Gupta, chief medical correspondent, CNN
Marijuana vs. alcohol and cigarettes
Dr. Sanjay Gupta joined WTOP Friday. (Roger Kisby/Getty Images)
8:50 a.m. - Mike McGrath, WTOP's garden editor
New this season: Liquid corn gluten
7:50 a.m. - David Gregory, moderator, Meet the Press
The week's political news
7:20 a.m. - Dylan Ratigan, former CNBC and MSNBC host
Helping combat vets find work with hydroponic farms
Former MSNBC host Dylan Ratigan joined WTOP on the air Friday. (Stephen Lovekin/Getty Images Entertainment)
6:50 a.m. - Bob Schieffer, CBS chief Washington correspondent and host of 'Face the Nation'
Is another debt ceiling standoff in the works?
6:20 a.m. - Peter Singer, director, Center for 21st Century of Security and Intelligence at Brookings Institution
How drone issues will multiple
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Cuomo to Kardashian: You might be breaking the law.
Germany seizes the pet after the Biebs fails to get it from customs.
Can you guess why this pigeon is the world's most expensive?
This fox plays like a cat when he gets his paws on a golf ball. (Video)