Starting next month, the Army will begin a crucial series of operational tests of a multibillion-dollar program designed to bring a new direct-fire capability to the battlefield in support of infantry units. Stretched out over the next three months, the M10 Booker combat vehicle will be judged under operational conditions. Fitted with a 105mm gun, it is designed to provide direct-fire capability to infantry units similar to an Abrams main battle tank, while being light enough to move around the...