7 Going on 70: Barbara Walters Reports on Progeria

Aimee Copeland Gets Bionic Hands

Touch Bionics donated prosthetics to Georgia woman, 25, who lost her hands to flesh-eating bacteria.

Wait Begins for Owner of Winning Powerball Ticket

One ticket worth a half-billion dollars was purchased in small Florida town of Zephyrhills.

Aimee Copeland's Comeback After Flesh-Eating Bacteria

Woman who lost her limbs talks about her positive outlook on life.

Cops Kill Hofstra Student in Home Invasion Standoff

A police officer made a split-second decision when a man held Andrea Rebello hostage.

Monster Twisters Caught on Tape

At least four tornadoes touch down in Kansas; heavy rain and winds on its way.

Police Accidentally Shoot Hofstra Student in Deadly Hostage Situation

Andrea Rebello was fatally shot by authorities in confrontation with alleged home , put in headlock

Powerball: $590 Million Winning Ticket Sold in Florida

A supermarket in Florida sold the winning ticket.

$590 Million Powerball Ticket Sold in Florida

The search is on for the lucky person who purchased the winning ticket.

Yale Graduate's Essay Resonates After Death

Recent grad and promising writer Marina Keegan, 22, died in a car crash.

Roundtable II: Politics of Scandal

George Will, Katrina vanden Heuvel, Jeff Zeleny, April Ryan, and Ron Fournier.

Aimee Copeland on 'Katie': 'Love Life'

Flesh-eating disease survivor tells Katie Couric that she doesn't like being called "disabled."

Hofstra Student Killed by Police During Break-in Shootout

College junior Andrea Rebello is shot by an officer in gun battle with wanted criminal.

Tornado Chasers Catch Outbreak on Tape

ABC News' Ginger Zee joins a storm chaser during a large breakout of storms.

Cold War Bomb Shelter For Sale as "Ultimate Man Cave"

Real estate broker Hoyt Murphy bills latest sale as "survivalist's dream home."

Randy Pausch's Last Lecture: Wife's Take

Professor's wife writes book about caring for dying husband.