kabul u.s. afghan force launch joint attack taliban opium factories try curb insurgent group economic lifeline officials countries say monday u.s. army general john nicholson show videos press conference target aerial strike describe taliban drug factories last night conduct strike northern helmand hit taliban hurt narcotics finance say nicholson flank afghan army lieutenant general mohammad sharif yaftali southern province helmand suffer heavy fight single-largest producer opium opium production afghanistan reach record highs year 87 percent last year unite nations say last week u.n. office drug crime unodc say output opium make poppy seed afghanistan world main source heroin stand around 9,000 metric tons year unodc warn past kabul weaken grip security contribute collapse eradication efforts nearly half afghan opium process refine morphine heroin traffic country accord u.s. afghan officials determine tackle criminal economy narcotics traffic full force say afghan president ashraf ghani twitter nicholson say attack part u.s. president donald trump new policy toward afghanistan boost troop number four-star general show one video f-22 fighter jet drop 250-pound bomb two build emphasize nearby third build leave unscathed u.s. troop long accuse cause unnecessary collateral damage civilian deaths unite state say take every precaution avoid civilian casualties unite nations say least 10 civilians may kill strike kunduz early month contradict u.s. investigation find civilian deaths u.s. afghan force strike opium factories curb taliban fund