One women's basketball team attempts to extend a historic streak. Two New York aces - CC Sabathia and Johan Santana - take the mound in spring exhibitions. Three more invitations to the NCAA men's hoops tournament are handed out. And four of the world's best soccer teams look to advance into the Champions League quarterfinals (all times Eastern).
- Tigers vs. Nationals (1 p.m., MLB.TV): Washington right-hander Stephen Strasburg, the No. 1 overall pick in the 2009 first-year player draft, makes his much-anticipated spring training debut against Detroit.
- Arsenal vs. FC Porto (2:45 p.m., FSC): Arsenal trails 2-1 entering the return leg of its Champions League tie with the Portuguese giants. Can Arsene Wenger's charges make up the deficit in North London? Fiorentina meets Bayern Munich in the other Round of 16 match (2:45 p.m., FSN).
Nigeria's acting president replaced his national security adviser Tuesday, two days after mobs massacred hundreds in villages in central Nigeria.
Eric Massa: "Effective at 5 p.m. on Monday the 8th of March, I will resign my position as the Federal Representative of New York's 29th Congressional District in the 111th Congress. I do so with a profound sense of failure and a deep apology to all those whom, for the past year, I tried to represent as our Nation struggles with problems far greater than anyone can possibly imagine."
That statement is posted on the former congressman's Web site. He announced last week he would not seek re-election because of health concerns and denied reports that he had harassed one of his Capitol Hill staff members.
Massa said he was targeted because he was standing in the way of passing health care legislation, having voted against the House's health care reform bill in November. House Democratic leaders on Monday refuted his allegation.
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.
Hereâ€™s a look at some of the stories CNN.com reporters are working on Tuesday:
Ohio State shooting - A suspect was in custody after a shooting at The Ohio State University early Tuesday morning, the university said. CNN affiliate WCMH reported that one person was killed and two were wounded in the shooting near Ohio Stadium at the university's campus in Columbus. The university said no students were involved in the incident. We'll continue to follow this story as it develops throughout the day, including details on the shooter and a possible motive.
Same-sex marriage - Dozens of same-sex couplesÂ plan toÂ marry in the District of Columbia on Tuesday, the first day that such unions will be legal in the nation's capital. The first marriages are scheduled to happen around 9:30 a.m. ET. Our reporters will bring you live video of the first couples tying the knot and talk to them about what it means.
An update from London on some of the stories that our reporters are following that we're expecting to develop through the day on Tuesday:
Nigeria attacks - Rights groups and the U.S. government are calling for an investigation following the religious violence in Nigeria which left hundreds dead over the weekend. Christian Purefoy analyses the latest spike in violence andÂ talks to residents and families about what happened.
Indonesia terrorism - A police raid on the outskirts of Jakarta may have killed one of Indonesia's most-wanted terrorists, though officials said they would await tests to verify the man's identity.Â Counter-terrorism squad members say that Dulmatin -Â a senior member of the al Qaeda-linked terror network, JemaahÂ Islamiyah -Â was killed inÂ a shootout in Pamulang, BantenÂ province. Read the full story