MINNEAPOLIS (WCCO) — These are the four stories you need to know about for Tuesday, Sept. 8. They include the big night for a comedian ready to step into David Letterman’s shoes, and the day many kids around Minnesota have been dreading for weeks now.

School Year Begins For Most Minnesota Students

More than 837,000 students head back to class this week. For the second year, nearly every kindergarten student will attend all day school free of charge. At 9:15 a.m. Gov. Mark Dayton, Lt. Gov. Tina Smith and Education Commissioner Brenda Cassellius are holding a welcome back ceremony at Brimhall Elementary in Roseville.

Walter Palmer Returns To Work

Dr. Walter Palmer, the Bloomington dentist who killed Cecil the lion, said he is going back to his dental practice Tuesday. The death of the lion in Zimbabwe sparked a debate on trophy hunting in Africa. Regulations tightened for lion, elephant and leopard hunting. And three U.S. airlines banned shipment of the trophies. Palmer said he didn’t know Cecil was a named, high-profile animal and that he believed he acted legally during the July hunt.

Paying Via Selfies?

Selfie lovers, rejoice! Your moneymaker may soon be your money-payer. On Tuesday, MasterCard will start testing a program that would allow cardholders to verify their online purchases with a selfie. The credit card company is also testing fingerprint and voice recognition methods for verification, all of which would be available on their app. MasterCard employees will run the trials through October.

Stephen Colbert Kicks Off Late Night Stint

Stephen Colbert is ready to show his true self while replacing David Letterman. His first guests for Tuesday night’s show are George Clooney and Republican presidential candidate Jeb Bush. Kendrik Lamar will also perform. “The Late Show with Stephen Colbert” debuts after WCCO 4 News At 10.