were there any warning signs? whitney houston s final hours. nuclear standoff. it happened in japan. could it happen here? i always thought it was fatally flawed. unfortunately fukushima proved me right. safety concerns over an aging nuclear facility. deadly cargo. would you believe this laser printer is a weapon of terror? we ll show you how al qaeda got these printer bombs through security and onto planes. revealing investigations, fascinating characters, stories with impact. this is cnn presents with your host tonight randy kay and dr. sanjay gupta. good evening. whitney houston will be remembered as one of the greatest voices of her generation and many of her closest friends say the troubled star was poised to make a comeback. that was tragically cut short with her untimely death. whitney houston s soaring talent was shadowed by her troubles with addiction and her marriage and don lemon looks at her rise to tame fame, had her fall from super-stardom and the fi