al qaeda supported Supporting the taliban with thousands of imported fighters from pakistan , arab countries , and central unk < ref unk '' ahmed unk telegraph Communication '' > < unk >

the pns mehran attack Attack was an unk by tehrik-i-taliban pakistan ( ttp ) and al qaeda which took place Process_start on 22 may 2011 , at pns mehran , the headquarters of the pakistan navy 's naval air arm and the most populous pakistani military installation .