1. As the nation commemorates the 50th anniversary of the Civil Rights Act, we're taking a look at the progress we've made... and how far we have left to go.
"We are here today because we know we cannot be complacent. For history travels not only forwards; history can travel backwards, history can travel sideways. And securing the gains this country has made requires the vigilance of its citizens. Our rights, our freedoms -- they are not given. They must be won. They must be nurtured through struggle and discipline," President Obama said today.
We'll talk about the path forward with Brittney Cooper, assistant professor at Rutgers University and contributing writer to Salon, and Jonathan Chait, columnist for New York Magazine and author of the latest cover story, "The Color of His Presidency."
2. Then: late-developing news from Washington on the planned resignation of Health and Human Services Secretary Kathleen Sebelius.
3. Next up: what's with this video of Chris on YouTube? Chris is back and he explains tonight. Ellen Weintraub, Commissioner of the Federal Elections Commission, joins us.
4. Huge news for late-night TV: Stephen Colbert will succeed David Letterman on the 'Late Show.'
5. Plus: Legendary director James Cameron joins us to talk about his new project with Showtime (and our own Chris Hayes!), a miniseries called "Years of Living Dangerously," on the disastrous effects of climate change.