Chairman of the Joint Chiefs of Staff Gen. Joseph Dunford said today the Pentagon should be cautious about increasing the size of the military at the expense of investments in new technologies critical to maintaining longstanding advantages over China and Russia. Dunford, who spoke at the Brookings Institution in Washington, said the Defense Department has "done the math" to justify the need for 3% to 5% growth above inflation to meet both capacity and capability requirements. He conceded, however, that...