Donald Driver to Announce Retirement on Twitter

Tornado Twists Through Okla.

Twister ripped apart homes from Newcastle to Moore, a path of 12 miles.

2 Schools Decimated by Oklahoma Twister

Two-mile-wide tornado touched down just as students were being released from school.

Massive Tornado Devastates Oklahoma City Area, Dozens Killed

Elementary schools, homes and hospitals were destroyed in the monster twister's wake.

Tornado Rips Through Moore, Okla.

The National Weather Service says tornado had wind speeds up to 200 mph.

Aftermath of the Oklahoma Tornado

Emergency and rescue workers rush to help survivors.

Assessing the Injured from the Oklahoma Tornado

Hospital worker Brook Cayot discusses treating victims of the Oklahoma tornado.

Storm Chasers in a Tornado Outbreak

Veteran storm chaser Ginger Zee with the latest breaking news and storm developments.

Miller: 'I Did Not Mislead Congress'

IRS commissioner testifies on Capitol Hill following alleged targeting of conservative political groups.

Rhode Island Student Disappears on Drive Home

Matthew Royer, 21, never arrived at his Pennsylvania home after leaving the University of Rhode Island.

Hero Teacher: 'I Saw the Tornado Coming'

Sherri Bittle and Cindy Lowe helped save dozens of lives when the tornado hit Briarwood Elementary.

Father Reunited With Son After Oklahoma Tornado

Wheeler family describes the moment of joy when son returned home safely.

Jodi Arias Judge Denies Attorneys' Request to Withdraw

Kirk Nurmi asked for a mistrial in the death penalty phase citing prosecutorial misconduct.

Tornado Outbreak: Destruction in the Heartland

The Midwest has suffered from three straight days of tornado activity.

Tornado Chasers Catch Outbreak on Tape

ABC News' Ginger Zee chases tornadoes during a large breakout of storms.

Donald Driver Announces Retirement