Misc: which national park contains the lowest point in the western hemisphere?

Questions

Erich Warsitz makes first jet-propelled flight (in a Heinkel He-178).?

Ira Levin, author (Rosemary's Baby, Sleuth, This Perfect Day)?

Yuri V. Malyshev, Soviet cosmonaut (Soyuz T-2, T-11)?

Susan 'Tuesday' Weld (in New York City), actor?

Launch of Mariner 2 which makes first Venus flyby.?