Jack the Ripper, the world's greatest ever serial killer. For over a hundred years he has eluded every investigator. Could it be that they have all been looking in the wrong place - and that the identity of Jack the Ripper is to be found not in London but in ... America?

When the Twin Towers collapsed on September 11, 2001, thousands were feared trapped beneath the tons of steel and rubble. These are the stories of the rescue workers and civilians who raced to Ground Zero to rescue the buried. Immediately after the collapse, rescue workers are convinced that they will find survivors in the ruins – and, miraculously, a handful are found. As the last survivors are pulled from the rubble, the rescuers shift focus to the monumental task to identify and recover the lost among the ruins. After the Towers Fell is the first in-depth look at the aftermath of the Towers' collapse and the heroes who selflessly took on the monumental task of rescue and recovery of their fellow New Yorkers

Where do flying saucers originate? Do they carry aliens from other worlds? Or is the truth actually a lot stranger. During World War II the Nazi's employed scientists to re-imagine the boundaries of scientific thought and practise. Many in the field of advanced weapon design - the programme that produced the V1 and V2 rockets that rained on Britain. But did this same unit produce rudimentary flying saucers? Declassified military documents detail the numerous reports by allied pilots of 'foo fighters', unusual craft with incredible acceleration engaging them in the skies above Germany. In addition there was the Nazi 'Der Glocke' or 'The Bell' project for a vertical take-off vehicle, which resembles eyewitness reports of a UFO crash in Pennsylvania after the war. Thousands of Nazi scientists were brought to the US at the end of the war. Are these men, and the projects they continued to work on in America, responsible to little green men, 400 UFO sightings a month and even the ...

In this exciting tour of the National Air and Space Museum- Smithsonian Networks puts you in the cockpit. From humble beginnings to the sprawling institution which has become the most visited museum in the world- the story of our struggle to leave the ground is embodied in the machines that carry us. Our HD cameras are your eyes as you view the epic achievements of the first century of flight. See famous "space race" aircraft like Sputnik and Apollo 11.