Transcript for Crack In the Arctic Ice: Can We Jump It?
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ABC News Live
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2 Schools Decimated by Oklahoma Twister
2 Schools Decimated by Oklahoma Twister
Two-mile-wide tornado touched down just as students were being released from school.
Tornado Twists Through Okla.
Tornado Twists Through Okla.
Twister ripped apart homes from Newcastle to Moore, a path of 12 miles.
Massive Tornado Devastates Oklahoma City Area, Dozens Killed
Massive Tornado Devastates Oklahoma City Area, Dozens Killed
Elementary schools, homes and hospitals were destroyed in the monster twister's wake.
Hero Teacher: 'I Saw the Tornado Coming'
Hero Teacher: 'I Saw the Tornado Coming'
Sherri Bittle and Cindy Lowe helped save dozens of lives when the tornado hit Briarwood Elementary.
Tornado Rips Through Moore, Okla.
Tornado Rips Through Moore, Okla.
The National Weather Service says tornado had wind speeds up to 200 mph.
Storm Chasers in a Tornado Outbreak
Storm Chasers in a Tornado Outbreak
Veteran storm chaser Ginger Zee with the latest breaking news and storm developments.
Aftermath of the Oklahoma Tornado
Aftermath of the Oklahoma Tornado
Emergency and rescue workers rush to help survivors.
Assessing the Injured from the Oklahoma Tornado
Assessing the Injured from the Oklahoma Tornado
Hospital worker Brook Cayot discusses treating victims of the Oklahoma tornado.
Miller: 'I Did Not Mislead Congress'
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
Rhode Island Student Disappears on Drive Home
Matthew Royer, 21, never arrived at his Pennsylvania home after leaving the University of Rhode Island.
Oklahoma Tornado Leaves Behind Mangled Heaps
Oklahoma Tornado Leaves Behind Mangled Heaps
The 2-mile-wide tornado reduced neighborhood blocks to smoking piles.
Police End Search for Missing Mom Susan Powell
Police End Search for Missing Mom Susan Powell
Utah police say they lacked evidence to bring charges in the case of Powell's 2009 disappearance.
Jodi Arias Judge Denies Attorneys' Request to Withdraw
Jodi Arias Judge Denies Attorneys' Request to Withdraw
Kirk Nurmi asked for a mistrial in the death penalty phase citing prosecutorial misconduct.
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