Adm. Mike Mullen said ISI has `` longstanding relationship '' with the Haqqani Network . The U.S. military is also investigating whether Pakistani officials were involved in a plot to assassinate former Afghan President Hamid Karzai and his family last year. Despite strain , Mullen says leaders `` are very committed to working our way through this ''
Adm. Mike Mullen said ISI has `` longstanding relationship '' with the Haqqani Network . A senior Pakistani intelligence official says that relationship is `` that of an adversary '' `` Onus of providing proof on this '' rests with the Americans , the official says . Despite strain , Mullen says leaders `` are very committed to working our way through this ''