sentences:  To avoid the problems seen with ammonium nitrate, he had GALCIT-46 cooled and then heated prior to testing.When it failed the test, he realized that the fuel's binding black powders rather than the oxidizers had resulted in their instability, and in June that year had the idea of using liquid asphalt as an appropriate binding agent with potassium perchlorate as oxidizer.Malina recounted that Parsons was inspired to use asphalt by the ancient incendiary weapon Greek fire; in a 1982 talk for the International Association of Astronomical Artists Captain Boushey stated that Parsons experienced an epiphany after watching workers using molten asphalt to fix tiles onto a roof.