A new PBS documentary called “The Human Face of Big Data” deals with how massive amounts of information about us and our world are being collected and analyzed. Rick Smolan, the film’s executive producer and author of the book on which it’s based, and Jay Walker, a leading figure in the film and chairman of Walker Innovation, join “CBS This Morning: Saturday” to discuss how data collected helps us grapple with some of the world’s biggest challenges. Source

Former Republican presidential candidate Mitt Romney suggested Wednesday that a “bombshell” is waiting in Donald Trump’s tax returns. Trump responded with an insult while his two biggest rivals, Ted Cruz and Marco Rubio, vowed to release their tax returns. Major Garrett reports. Source

The Coast Guard said 13 other people were on the commercial lift boat when it flipped in rough seas in the Gulf of Mexico. Source

The election season gets down to brass tacks on Super Tuesday, when about half the delegates needed for the GOP nomination and a third of those needed for the Democratic nomination go up for grabs. The stakes are high, and tensions even higher. Source

The canal authority demanded at least $900 million, according to a judicial official. Source

The address is not an official State of the Union because a president’s first speech before Congress is not considered a State of the Union. Source

In this web extra, the Academy Award-nominated star of “Brooklyn,” preparing to make her Broadway debut in Arthur Miller’s “The Crucible,” runs through a scene with the help of correspondent Jane Pauley (who acts out all the other parts). Source

Debris is scattered across the South after a series of deadly and damaging tornadoes. Winds whipped through a trailer park in Louisiana, where two people were killed. The storms damaged several homes and buildings. More than 80 million Americans still face a severe weather threat as the system moves from the Gulf to the Mid-Atlantic. David Begnaud reports from Convent, Louisiana. Source

The Royal Family is observing a two-week period of mourning. Source

Republican presidential candidate and Florida Sen. Marco Rubio came in second in the Nevada caucuses with 24 percent of the Republican vote, far behind frontrunner Donald Trump who won with 46 percent of the vote. Rubio joins “CBS This Morning” from Grand Rapids, Michigan, to discuss his campaign. Source