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WASHINGTON (WUSA9/USA Today) -- Here are five things you need to know for Tuesday, February 4.

5. The battle line over same-sex marriage moves to a Virginia courtroom today when two couples challenge the state's ban. Gay rights advocates have several reasons to be optimistic: The state's attorney general has switched sides and no longer will argue for the ban; the plaintiffs have lawyers Ted Olson and David Boies, who won the Supreme Court battle for marriage rights in California, on their side; and the judge is a former public defender nominated by President Obama.

VIDEO: Va. won't defend same sex marriage ban

4. President Obama will visit Buck Lodge Middle School in Prince George's County to deliver remarks detailing progress toward his goal of connecting 99% of students to next-generation broadband and wireless technology within five years. The president has secured secured commitments from U.S. companies worth about $750 million to get more students connected to high-speed Internet.

MORE: President secures $750M in pledges to get kids online

3. A bill that would decriminalize possession of small amounts of marijuana in the District is expected to advance Tuesday at a D.C. Council meeting. If approved, it will be on the agenda for final passage at the council's next legislative session. The measure would remove criminal penalties for possession of less than one ounce of marijuana for individuals 18 years of age and older and replace them with a civil fine of $25, similar to a parking ticket.

VIDEO: D.C. pot bill may be in jeopardy

2. Today Facebook celebrates 10 years since Mark Zuckerberg's Harvard dorm room launch of the social network, a business now worth more than corporate centenarians General Motors and Ford Motor combined. Whiz kid-turned-CEO Zuckerberg's social juggernaut, now the de facto water cooler gathering for 1.23 billion worldwide, commands the world's largest network and a coveted advertising position.

MORE: Zuckerberg reflects on Facebook at 10

1. Today is World Cancer Day, and this year's campaign focuses on reducing stigma and dispelling myths about cancer. The overarching goal of World Cancer Day is to facilitate, "major reductions in premature deaths from cancer, and improvements in quality of life and cancer survival rates."

MORE: World Cancer Day events in your area

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