sentences:  For extra money he manufactured nitroglycerin in their home, constructing a laboratory on their front porch.At one point he pawned Helen's engagement ring, and he often asked her family for loans.Malina recounted that "Parsons and Forman were not too pleased with an austere program that did not include at least the launching of model rockets", but the Group reached the consensus of developing a working static rocket motor before embarking on more complex research.