PBS America (Freeview) Saturday

Maiya May explores heat in Portland, Oregon, and Medellín, Colombia, a city that is leading the revolution against sweltering city temperatures

Ken Burns' documentary sees the inhabitants of communities in Alabama, California, Connecticut and Minnesota recall the effects of the Second World War on their lives

How ordinary Americans began to fear the worst when U-boats were found patrolling the United States' east coast and few encouraging reports came through from overseas

The documentary series examining American communities during the Second World War continues, focusing on events that occurred one year after the US became involved in the conflict

Recalling the American airmen who took on daylight bombing missions over the heart of Hitler's Germany

Recalling how US Marines took the tiny Pacific atoll of Tarawa in November 1943 after three days of intense fighting - and at a terrible cost to human life

The story of the two million US soldiers who fought alongside French and British troops on the bloody battlefields of the First World War

Part one of two. Examining the race to build the first supersonic airliner between Europe's Concorde, the Soviet TU144 and the American Boeing 2707

Part two of two. How America's supersonic dream ended and the battle between Russia's TU144 and Europe's Concorde

The story of the two million US soldiers who fought alongside French and British troops on the bloody battlefields of the First World War