More details come to light about deadly plane crash into San Diego homes

Tonight -- we'll continue our coverage of that deadly private plane crash in San Diego. The key factors federal investigators are zeroing in on as they try to figure out what led to the tragedy. And we'll highlight the heroic actions of neighbors who saved lives after that fiery crash into homes and cars. Plus -- visitors to Seattle's iconic space needle can now enjoy an even better view on the way to the top: what makes the landmark's new elevators so unique.