Sen. Lisa Murkowski (R-AK) is confronting the Air Force over an environmental study that could support a controversial force-structure strategy Defense Secretary Leon Panetta put on ice in June, according to a congressional source. Murkowski, a member of the Senate Appropriations defense subcommittee, sent a Sept. 5 letter to Pacific Air Forces Commander Gen. Herbert Carlisle, requesting an explanation for why the Air Force was moving forward with preparatory work for an environmental assessment document that was to determine the...