A new Pentagon study for the first time sizes up planned investments in the Army's Patriot program and warns that key performance improvements could be delayed by decades. The congressionally mandated evaluation found that of the $8 billion the Army has programmed for the portfolio between fiscal years 2016 and 2020, only $1.1 billion could be directed toward better and potentially less expensive equipment. The rest of the funds are destined by the service to pay for the interceptor missile...