BLACKWATER 61 - "Blackwater 61" is the call sign of a plane flown by the embattled government contractor Blackwater that crashed into a mountain in Afghanistan killing all onboard. The widow of one of the soldiers killed - a pilot herself - says the firm was negligent in the way it operated the flight. Steve Kroft reports. Draggan Mihailovich is the producer. THE BLOOM BOX - Large corporations in California have been secretly testing a new device that can generate power on the spot, without being connected to the electric grid. They're saying it's efficient, clean, and saves them money. Will we have one in every home someday? Lesley Stahl reports. Shachar Bar-On is the producer. GROUND ZERO - It's been eight years since the attack on the World Trade Center and billions of dollars have been spent, yet none of the promised buildings and memorial has been completed in what its developer calls "a national disgrace." Scott Pelley reports. Shawn Efran and Catherine Herrick are the producers.