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    Jon Stewart fights to help veterans exposed to burn pits (Part 1)

    04:10
  • Jon Stewart fights to help veterans exposed to burn pits (Part 2)

    02:53
  • Inside the effort to feed Florida's manatees (Part 1)

    02:58
  • Inside the effort to feed Florida's manatees (Part 2)

    01:02
  • 80 years after Pearl Harbor, survivors reflect on the day that changed history (Part 1)

    06:28
  • 80 years after Pearl Harbor, survivors reflect on the day that changed history (Part 2)

    06:29
  • Musicians spreading holiday cheer in hospitals across U.S. (Part 1)

    01:43
  • Musicians spreading holiday cheer in hospitals across U.S. (Part 2)

    02:17
  • Blood test detects over 50 types of cancer (Part 1)

    02:31
  • Blood test detects over 50 types of cancer (Part 2)

    01:28
  • How the elite U.S. Forest Service hotshots battle wildfires (Part 1)

    02:05
  • How the elite U.S. Forest Service hotshots battle wildfires (Part 2)

    02:08
  • Climate change in Guatemala: Between starvation and migration (Part 1)

    06:51
  • Climate change in Guatemala: Between starvation and migration (Part 2)

    05:11
  • A look at St. Louis' iconic Gateway Arch (Part 1)

    02:01
  • A look at St. Louis' iconic Gateway Arch (Part 2)

    01:58
  • Extended interview: Rita Moreno and Ariana DeBose on ‘West Side Story’ remake (Part 1)

    03:03
  • Extended interview: Rita Moreno and Ariana DeBose on ‘West Side Story’ remake (Part 2)

    03:18
  • Black playwrights take center stage on Broadway (Part 1)

    03:46
  • Black playwrights take center stage on Broadway (Part 2)

    02:24

Mission to Mars: New rover to aid in human colonization (Part 2)

03:52

Sending humans to Mars will be an unprecedented scientific undertaking that comes with significant risk. NASA researchers discuss the technical, physical and mental challenges to sending humans to Mars.