Article Photos: US: Haqqani tie to Afghan insider attacks possible 2/2

  In this June 19, 2012 file photo, Afghan soldiers and a policeman prepare for a mock ambush as part of a training exercise at the U.S. Marine-run Joint Sustainment Academy, Camp Leatherneck in Helmand, south of Kabul. The U.S. suspects the Haqqani insurgent network, which has ties to al-Qaida and is based in Pakistan, is a driving force behind many of the “insider” attacks by Afghan forces that have killed more than 50 U.S. and allied troops this year, officials say. Until now, officials have said the attacks seemed to stem either from personal grievances against the allies or from Taliban infiltration. (AP Photo/Heidi Vogt)