Tonight two convicted murderers are on the loose. They were serving life sentences without the possibility of parole, but they were able to walk out of prison after phony documents containing forged signatures ordered their release a few weeks ago. There is a massive manhunt underway, along with a review of prison records to see if any other inmates were also mistakenly released. John Zarrella has the latest.
Kim Segal and John Zarrella
They're at the top of the ocean's food chain - but it is still a mystery how the oil disaster is affecting the shark population in the Gulf of Mexico.
Even if sharks never touch the oil slick, their sources of oxygen and food are at risk. And a reduced shark population could impact the entire Gulf ecosystem, according to Neil Hammerschlag, a researcher at the University of Miami, who has been studying sharks for a decade - tagging them to determine their migratory patterns and other behaviors.
Today, his research focus has changed.
"The oil spill opens up a whole new avenue for critical research," says Hammerschlag.
Program Note: Tune in tonight to see more home videos from the astronauts on the space shuttle Atlantis on AC360° at 10 p.m. ET.
Commander Scott Altman and Mission Specialist Mike Massimino talk about filming the landing of the shuttle. Altman wants to make sure Massimino knows how to capture the landing.
Altman, a retired Navy F-14 fighter pilot is the commander of the current space shuttle Atlantis mission to repair and upgrade the Hubble Space Telescope. He also doubled for the actors, including Cruise, during the Southern California shoot of the 1986 hit movie 'Top Gun.'
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
Questions or comments? Send an email
Want to know more? Go behind the scenes with