Gracey Evans: In 30 seconds I saw three people get stabbed
There are several heroes emerging from the stabbing rampage at Franklin Regional High School. One of them is Gracey Evans. She helped save lives in the moments after the stabbing. That includes her best friend, who had just been protecting her. Gracey tells Anderson, "I held his hand and he didn't let go the whole way to the hospital."
Today's stabbing is sending shockwaves through the small community near Pittsburgh. Pamela Brown has the story.
Dramatic testimony in the Pistorius trial
Oscar Pistorius returned to the witness stand and faced tough questions under cross examination today. The prosecutor who grilled the former Olympian is known for his combative style. At one point he forced the courtroom to look at graphic pictures of Reeva Steenkamp after the shooting. Robyn Curnow has the latest.
U.S. Navy Commander on finding Flight 370: We are much more optimistic
The towed pinger locator has become one of the most important tools in the Flight 370 search. Since Saturday, it detected four pings within 17 miles of each other. Anderson speaks with U.S. Navy Commander William Marks aboard the USS Blue Ridge.
How deep is the Flight 370 search zone?
After picking up this latest round of pings, authorities say they are optimistic they will find Flight 370. Investigators are narrowing the search zone. If the missing plane is there, it could be 13,000 feet below the surface in one of the most challenging environments on earth. Anderson has a closer look.
Gary Tuchman reports on a company that is using cutting edge technology to map the ocean floor.
Ship picks up new pings in the Flight 370 search zone
Authorities report an Australian ship detected fresh pulses in the search for Flight 370. Retired Air ChiefMarshal Angus Houston says the pulses are consistent with electronic equipment. He went on to say that he is now "optimistic we'll find the aircraft or what's left of the aircraft." Anderson discussed these developments with safety analyst David Soucie, aviation correspondent Richard Quest, Boeing 777 captain Les Abend, aviation analyst Miles O'Brien and former Department of Transportation Inspector General Mary Schiavo.
Searching in one of the most difficult locations on earth
The Flight 370 search zone is deep, rough and hard to reach. This isn't the first time a massive search has been necessary in this region. It took decades to find a ship that sank during World War Two. Atika Shubert looks at the lessons that might help in the Flight 370 search.
Anderson discussed this with David Gallo who co-led the search for Air France Flight 447.
Adrianne Haslet-Davis: I want people to know it's OK to not be OK
Professional dancer Adrianne Haslet-Davis lost her lower left leg in the Boston Marathon bombing. Days after the attack, she vowed to dance again and she even promised Anderson a dance lesson. She achieved both goals and the highs and lows of her journey are captured in the CNN Special Report: The Survivor Diaires. Adrianne tells Anderson it is a really honest look at what it's like to go to hell and back.
How debris can help solve aviation mysteries
Even small pieces of wreckage from Flight 370 could provide investigators with big clues to the plane's fate. Understanding what the debris reveals is both a science and an art. USC's Aviation Safety and Security Accident Lab teaches students how to find those clues. Stephanie Elam got a lesson from their aviation safety expert Michael Barr.
Go behind the scenes: AC361°
Gumby celebrates Isha Sesay's birthday
Anderson Cooper's birthday surprise
You asked, Anderson answers
