PHILADELPHIA - A Third Circuit U.S. Court of Appeals panel on June 5 reversed a ruling that dismissed Lockheed Martin's third-party complaint against the U.S. government, the Commonwealth of Pennsylvania and its Department of Conservation and Natural Resources (DCNR) on the ground that they were immune from the company's claim for contribution under the Comprehensive Environmental Response Compensation and Liability Act (CERCLA), instead finding that the complaint was moot as a result of one of the company's counterclaims (Commonwealth of Pennsylvania, et al. v. Lockheed Martin Corp. v. United States of America, et al.,No. 10-4078, 3rd Cir.; 2012 U.S. App. LEXIS 11302).