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The chair of the joint chiefs of staff told us the biggest lesson he's learned in the fight against ISIS
The chair of the joint chiefs of staff told us the biggest lesson he's learned in the fight against ISIS
Amanda MaciasMar 30, 2016, 03:12 IST
WASHINGTON - The US has been able to greatly improve its use of intelligence over the 599-day fight against ISIS, the chairman of the Joint Chiefs of Staff told Business Insider on Tuesday.