Sen. John Thune, R-S.D., gives his takeaway on the IRS situation. He tells The Daily Rundowns Chuck Todd that obviously someone knew what was going on.(The Daily Rundown)

NBCs Pete Williams talks about the shooting and shares the latest details.(The Daily Rundown)

Will more Oklahoma schools have safe rooms and shelters after Monday's devastating tornado tore through Plaza Towers Elementary School, reportedly killing seven students? The Morning Joe panel discusses with MSNBC's Chris Jansing the cost of adding safe spaces to schools and why many schools do not have them.(Morning Joe)

FEMA Administrator Craig Fugate joins Morning Joe to discuss what the agency is doing on Wednesday in Moore, Oklahoma following a devastating tornado and what the agency has learned since Hurricane Katrina.(Morning Joe)

Former Rep. Anthony Weiner, D-N.Y., who resigned in 2011 after lewd online behavior, announced on Wednesday in a new political ad he was entering the New York City mayoral race. The Morning Joe panel discusses.(Morning Joe)

Top Talkers: In Moore, Oklahoma, emergency crews and the National Guard are beginning the task of clearing debris from areas hit hard by Monday's tornado. Joe Scarborough discusses what he saw while in Moore and how he thinks area schools should rebuild in the future, and MSNBC's Chris Jansing, Brian Shactman and Thomas Roberts also report from Moore, Okla.(Morning Joe)

Nick Stremble and Shannon Largent were on duty inside the Moore Medical Center as the tornado hit the building. MSNBC's Lawrence O'Donnell shares their story and also speaks to the Mayor of Moore, Oklahoma.(The Last Word)

Rachel Maddow updates the latest news from Moore, Oklahoma and talks with Oklahoma City mayor Mick Cornett and Oklahoma Lt. Gov. Todd Lamb about the cost and scale of the disaster and how Tornado Alley communities can best prepare for future weather events.(The Rachel Maddow Show)

Rachel Maddow points out that since the record setting tornado of May 3, 1999, "May 3" has had special meaning for Oklahomans. Monday's tornado may do the same for "May 20."(The Rachel Maddow Show)

Rachel Maddow reports on how the IRS scandal is developing with tea party activists hoping to turn the story to their advantage and investigations continuing into any actual wrongdoing while former and current IRS officials exacerbate the scandal with ineptitude.(The Rachel Maddow Show)