 During Project SHAD, "Bacillus globigii" was used to simulate biological warfare agents (such as Anthrax), because it was then considered a contaminant with little health consequence to humans; however, it is now considered a human pathogen.Ships equipped with the E-2 multi-head disseminator and A-4C aircraft equipped with Aero 14B spray tanks released live pathogenic agents in nine aerial and four surface trials in phase B of the test series from February 12 to March 15, 1965 and in four aerial trials in phase D of the test series from March 22 to April 3, 1965.According to Project SHAD veteran Jack Alderson who commanded the Army tugs, area three at Johnston Atoll was located at the most downwind part of the island and consisted of an collapsible Nissen hut to be used for weapons preparation and some communications.