Hard Hat History A hard-headed look at history's greatest hits. Hard Hat History’s tracks Episode 2: Great Air Races (Part 2) by Hard Hat History published on 2020-04-21T02:07:55Z Episode 2: Great Air Races (Part 1) by Hard Hat History published on 2019-08-20T15:58:49Z Trailer - Episode 2: Great Air Races by Hard Hat History published on 2019-08-08T13:21:38Z Episode 1: Polar Exploration (Part 2) by Hard Hat History published on 2019-03-20T19:10:04Z Episode 1: Polar Exploration (Part 1) by Hard Hat History published on 2019-03-05T21:37:56Z
