The armed services are having second thoughts about the annual ritual of listing for lawmakers key projects not included in the president's budget request, a practice that last year produced a tally exceeding $1 billion. The Army abstained from the process last year under the leadership of then-Chief of Staff Gen. Martin Dempsey, now the chairman of the Joint Chiefs of Staff. But the other services and U.S. Special Operations Command all provided unfunded-priorities lists for fiscal year 2012 in...