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DEVELOPING: Source tells NBC News that Israel has carried out an operation inside Iran

All In Agenda: Showdown in Ukraine

All In Agenda for February 28, 2014

1. We're covering the breaking news out of Ukraine: U.S. officials have confirmed that military and paramilitary Russian forces have entered the country. President Obama issued a warning Friday afternoon: 

"We are now deeply concerned by reports of military movements taken by the Russian federation inside of Ukraine. Russia has a historic relationship with Ukraine including cultural and economic ties and a military facility in Crimea. But any violation of Ukraine's sovereignty and territorial integrity would be deeply destabilizing."

2. A $21 billion veterans' benefits package died yesterday in the Senate. We're bringing you the story with Sen. Bernie Sanders, D-Vt., who sponsored the bill, and Jon Soltz, an Iraq War veteran and Chariman of votevets.org. 

3. Plus, a close look at the A-team who swooped in to save the President's Obama's signature health care initiative after a rocky rollout: Paul Smith joins us. 

4. And... it's Oscar time! Join us and the All In panel as we recap the year's best and place our bets for the big show.