This second inauguration day offers a second moment for President Obama to address the nation without the press of a crises or under the specific obligation of the U.S. Constitution. It's also Martin Luther King, Jr. Day. We meet Dr. King through the archives of Canadian Broadcasting Corporation reporter Eleanor Fisher, who interviewed Dr. King back in 1961.

Reforming the nation's immigration laws is likely to be a top priority for President Barack Obama in his second term in office. An immigration overhaul could eventually lead to millions of illegal immigrants becoming U.S. citizens. Katherine Tabares is an undocumented immigrant living in New York City and studying political science at LaGuardia Community College.

In the midst of all of today's pageantry, it's worth taking a step back and looking at what President Obama has done with his first term, especially when it comes to civil rights. Jared Ball is associate professor of communication studies at Morgan State University. Ron Christie is a Republican political strategist.

In 2008, Louisiana passed the Science Education Act, a law that allows schools to use supplemental materials when teaching evolution and global warming. Critics like activist Zack Kopplin argued that the law allows teachers to promote creationism.

Today, as the president takes the oath of office once more, the palpable hope and excitement of Obama's first inauguration has waned. How will President Obama's second inaugural compare to his first, and how does it fit the history of second inaugurals, from Lincoln on forward? Historian and author Kenneth C. Davis explores the history of second inaugurals, and discusses the expectations for President Obama.

Last week, noted poet Kwame Dawes started our our crowd-sourced inaugural poem project with these lines: Say "nation." In the wake of quarrels, say "hope." And you took it from there, sending us hundreds of suggestions for lines to be included in the poem via Facebook, Twitter, and more.

President Barack Obama delivered his second inaugural address to a crowd of several hundred thousand today in Washington D.C. Todd Zwillich, Washington correspondent for The Takeaway, and Dick Stevenson, chief Washington correspondent for The New York Times, offer their analyses.

President Obama delivered his second inaugural address today in Washington, D.C. Two voters who chose him in November, and one who didn't react to the president's address. Horacio Soberon-Ferrer is an independent Florida voter and vice president of the Alliance for Aging. Hermene Hartman is the editor-in-chief of N’Digo Magazine. John Rampe is a registered Republican and president of an Ohio manufacturing company.