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How Did They Build That?
S5, EP9 "Space Homes & Glass Waves"NASA's 3D-printed Mars habitat rehearses human life on the red planet. Seoul's historic city hall gains a 13-story glass wave. And in Dallas, 68,000 square feet of concrete galleries balance on legs that want to splay open under.
How Did They Build That?
S4, EP7 " Summit & Submerge"Building an eco-friendly visitor center in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.
How Did They Build That?
S3, EP9 "Curved & Cables"A new performance center with a tent-like glass-and-steel lobby tests engineers in Kansas City; two twisting apartment towers make heads spin in Ontario.
Air Disasters
S18, EP4 "Dead Tired"Investigating the 2009 crash of Colgan Air Flight 3407; the plane stalls at low altitude and dives into a residential area near Buffalo, N.Y.
Air Disasters
S24, EP10 "Deadly Directive"When Ethiopian Airlines Flight 302 crashes shortly after takeoff, the catastrophe leads to the grounding of the entire Boeing 737 MAX 8 fleet.
Air Disasters
S23, EP2 "Fight to the Finish"Three flight crews face impossible odds: a Boeing 707 loses engines over the Alps as fire spreads, Air Astana 1388 goes out of control over Portugal, and a bomb on PA 434 severs control cables and blasts a hole in the fuselage.
Air Disasters
S20, EP13 "VIP on Board"Airplane crashes involving high-profile passengers put added pressure on investigators.
Air Disasters
S7, EP7 "Out of Sight"In one of the world's busiest airports, a large passenger plane crashes into a smaller one; a 1986 midair crash between planes near Los Angeles brings attention to disturbing congestion at airports.
