kabul american warplanes afghanistan drop bomb number see since height u.s. troop surge 2010 president donald trump announce new strategy august ease attack curb widen range militant target september example u.s. air force drop 751 bomb increase nearly 50 percent august figure 503 reach high single-month total seven years military data show increase attribute president strategy proactively target extremist group threaten stability security afghan people air force say monthly report six f-16 fighter bombers deploy bagram air field north afghan capital kabul additional massive b-52 bombers assign strike afghanistan base persian gulf add air force number exclude strike u.s. army maintain arm helicopters aircraft afghanistan trump south asia strategy include promise expand authority u.s. force target militants afghanistan killers need know nowhere hide place beyond reach american might americans arm trump say august speech unveil strategy retribution fast powerful former president barack obama plan drawdown u.s. mission afghanistan often limit u.s. troop attack taliban certain circumstances self-defense month defense secretary jam mattis confirm congress restrictions would lift trump plan u.s. bomb drop afghanistan high since 2010 new trump strategy