How Did They Build That?

A look at different segments of America from the air.

Carved by the retreat of a two-million-year-old glacier, North America's five great lakes, Superior, Michigan, Huron, Erie and Ontario; form the largest freshwater ecosystem on Earth.

A chronicle of the daily challenges of the airport staff who manage to keep the facility open, freight flowing and passengers flying all despite weather that regularly dips to -36 degrees and wind speeds that typically exceed 100 mph.

Series reviews modern aircraft from the b2bomber to drones

DNA Profiling. Toxicology. Ballistics. Today's criminal investigators employ powerful scientific tools to catch bad guys. But where did they come from and how do they really work?

Series about recent marine disasters and the subsequent investigations.