9:00 am ET - Defense budget hearing - The House Armed Services Committee holds a hearing on the Pentagon's budget request for next fiscal year.

9:30 am ET - D.C. same-sex couple marriages - The first couples allowed to get married under the District of Columbia's new same-sex marriage law are expected to wed.

10:30 am ET - Shuttle mission overview - NASA updates the public on next month's planned launch of space shuttle Discovery.

1:30 pm ET - White House briefing - Press Secretary Robert Gibbs holds his daily briefing with reporters.

2:00 pm ET - Shuttle crew briefing - The crew for next month's planned launch of space shuttle Discovery talks with reporters.

5:30 pm ET - Greek Independence Day festivities - President Obama attends a White House event commemorating Greek Independence Day.