The U.S. Congress investigated statements that allegedly appeared on the firm's website claiming that it successfully kept on sale, for 10 years, a drug that was eventually cancelled as harmful. In response, CEO Matthew Weinberg issued a statement saying "The analyses we conduct are rigorous and adhere to established principles of scientific integrity […] We believe it is in the public interest for all scientific research to be subject to scrutiny and the views of all affected parties to be heard." The goal of any PFAS policy or regulation should be to determine the most effective steps needed to reduce human exposure and implement them within the broad context of protecting human health. This requires differentiating high concentration sites from background concentrations and taking action to mitigate concentrations at high use sites. It also demands both a reassessment of products we produce and use daily, and a realistic assessment of how to control PFAS chemicals already in the background environment. The Weinberg Group has consulted for a number of pharmaceutical, chemical, and tobacco companies. Chemicals that the Group has worked on include trichloroethylene (TCE), Teflon (see below), PCBs, Bisphenol A, and the organochlorine insecticide endosulfan. In 2007, The Weinberg Group was a sponsor of the International Society of Regulatory Toxicology & Pharmacology, a group described as "an association of dominated by scientists who work for industry trade groups and consulting firms," by David Michaels. Since 2006, The Weinberg Group has been a sponsor of The Washington Legal Clinic for the Homeless event – Lawyer's Pitch In. The Washington Legal Clinic for the Homeless is described as providing legal services to people facing homelessness in DC. In an article authored by Paul D. Thacker, "Environmental Science & Technology" reported that in April 2003, the Weinberg Group proposed a strategy to DuPont to help defuse the growing controversy over the health impacts of perfluorooctanoic acid (PFOA), a compound used to make Teflon. PFAS are commonly found in every American household, and in products as diverse as non- stick cookware, stain resistant furniture and carpets, wrinkle free and water repellant clothing, cosmetics, lubricants, paint, pizza boxes, popcorn bags, and many other everyday products. Weinberg's Vice-President of Product Defense, P. Terrence Gaffney, wrote in the February 22, 2006 The Weinberg proposal, "DuPont must shape the debate at all levels." One of his suggested strategies was to facilitate the "publication of papers and articles dispelling the alleged nexus between PFOA and teratogenicity as well as other claimed harm."