Giant technology firm Apple is paying billions of dollars less than it should in U.S. taxes each year, according to a report by the Senate Permanent Subcommittee on Investigations. In a hearing Tuesday in Washington, D.C., Apple CEO Tim Cook will defend the company.

The subcommittee's report says Apple avoids the tax payments mainly by shifting profits to three subsidiary companies in Ireland. The investigation found Apple is taking advantage of technicalities in U.S. and Irish tax laws to avoid paying any tax on a huge portion of its profits.

This evening on East Third Street at Sears Street in downtown Dayton, Ohio, four paintings that are copies of master works will be unveiled on the sides of buildings. The paintings were done by youths in Montgomery County's Juvenile Court system. WNKU's Steve Hirschberg talked about the painting program with Brittini Long of the Montgomery County Juvenile Court.

NBC News has put together a time-lapse video of the EF-4 tornado that tore through the southern suburbs of Oklahoma City, Okla.

As we told you in the live blog, the National Weather Service says it was at least an EF-4 tornado with winds in excess of 166 mph. The tornado stayed on the ground for 40 minutes and traveled 20 miles.

Although Oklahoma is a state where tornadoes are a fact of life, few days stand out like May 3, 1999.

It's another bad day for the Justice Department.

A federal judge in Louisiana has thrown out the central criminal charge against a former BP executive because prosecutors failed to prove he knew about a pending congressional investigation into oil flowing into the Gulf of Mexico three years ago. U.S. District Judge Kurt Engelhardt also ruled that a Democratic House member who inquired about the oil flow rate was acting as head of a subcommittee, not a full congressional committee, as required under the federal Obstruction of Justice statute.

Ray Manzarek, the keyboardist and a founding member of The Doors, died Monday in Germany. He was 74.

A statement from publicist Heidi Ellen Robinson-Fitzgerald said Manzarek died in Rosenheim, Germany, after a long battle with bile duct cancer.

Manzarek and Jim Morrison founded the iconic band after meeting in California. The Doors went on to become one of the most successful rock 'n' roll acts of the 1960s — and continues to have an impact decades after Morrison's death in 1971.