 After some time working on their theory and building their rocket motor and test stand, the GALSID group gathered all their supplies, hauled it from Caltech out into the desert, and did their first sets of tests on Halloween 1936. The GALSID group did their initial sets of testing in the Arroyo Seco, which JPL is now next to. The Arroyo Seco is built, well, it's a...