WASHINGTON, Jul 21 (Reuters) The Pentagon will not make military reimbursements to Pakistan for fiscal year 2016 after US Defence Secretary Jim Mattis told Congress that Islamabad had not taken sufficient action against the Haqqani network, a US official said today. "The funds could not be released to the Government of Pakistan at this time because the secretary could not certify that Pakistan has taken sufficient action against the Haqqani Network per the requirement in the FY 2016 National Defense Authorization Act," Adam Stump, a Pentagon spokesman, told Reuters. REUTERS SDR 2004