Thanks to the powder lance, missile makers and others wishing to install temporary concrete structures no longer need fear a costly removal job later, according to the July 1959 issue of Concrete Construction. In this process, aluminum and iron powder were burned in contact with pure oxygen to a combustion temperature of around 6000° F, thereby melting the concrete. “Extensive field tests have indicated that there is almost no limit to thickness of the concrete that can be pierced,” said the article.