COSTELLO: Checking stories cross country now. Seven people injured in a shooting at a Pittsburgh psychiatric hospital are expected to survive. Authorities say a gunman opened fire inside the hospital lobby killing one person before he was shot and killed by police. No word on the gunman's identity or motive. A federal appeals court temporarily blocks two provisions of a controversial Alabama immigration law. One voided contract signed by illegal immigrants. The other prevented them from obtaining driver's licenses. And in Florida, not one, but three good Samaritans come to the rescue. Surveillance video captures a Broward County deputy in a dangerous struggle at a fastfood restaurant with the crime suspect. The officer says he was in real trouble until three homeless men helped subdue the man. Everybody is OK today. Filmmaker James Cameron is about to attempt a dangerous and unprecedented mission to the deepest on the point on the planet, a place only two people have ever set eyes on, the bottom of the Mariana Trench off the coast of Guam, nearly seven miles beneath the Pacific Ocean. Yesterday, we told you about the uncharted territory he's attempting to explore. Today, we're going to tell you exactly how he's going get there onboard a high tech deep sea submersible. CNN's Jason Carroll was the only news reporter invited on camera and shipped for a tour. He's back in New York and he joins us live. This is insane, Jason. That would be a scary thing to do.</s>JASON CARROLL, CNN NATIONAL CORRESPONDENT: Well, Cameron is used to deep sea exploration. So it's not so scary for him, for the rest of us, scary definitely. You know, when you think about the submersible they had to design, there were so many things they had to really consider. You know, they had to consider the pressure. So much pressure that the device would actually shrink by two and a half inches once it's down at those depths. So that's just one of the factors that had to be considered in designing this type of sub.
Two Dead, Seven Hurt In Hospital Shooting; Alabama Immigration Law Partially Blocked