Watch the re-creation of an 18th-century hot air balloon, using period tools and materials.
Hear reports from the Ebola hot zone and from labs where scientists are racing to find a cure.
Get the inside story of the search for Flight MH370 and meet those who looked for the lost plane.
The 1932 kidnapping and killing of Charles Lindbergh's 20-month-old son is revisited. Investigators employ forensic and behavioral science techniques in an effort to learn what happened to the baby and why.