5:30 p.m. - Prof. Michael Greenberger, director, Center for Health and Homeland Security, University of Maryland
Bombings in Boston
2:20 p.m. - Fairfax Hackley, personal trainer
Tips for staying healthy and fit
11:20 a.m. Eva Rosenberg, Marketwatch
Don't rush your taxes
Turn your photos into an online video
9:20 a.m. Dr. Kathleen Hall, Mindful Living Network and Stress Institute.
New study shows hope can help heal
8:20 a.m. Chuck Todd, NBC's political director and Chief White House correspondent
Congress takes up immigration, gun legislation
7:50 a.m. - Gordon Chang, author of 'Nuclear Showdown: North Korea Takes on the World'
North Korea crisis in short hibernation
7:20 a.m. Deborah Hersman, National Transportation Safety Board chairwoman
Distracted driving: It's not just the phone
WTOP's Del Walters reports.
- Microsoft Is Developing a Smart Watch, Report Says
- After 81 years, landmark Memorial Bridge is in dire need of renovation
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