What does "at" mean here

Question

However, as the former head of the Crisis Room at DG RELEX Andrea Ricci ( 2014 , pp. 192–3) confirms, ‘Practice shows that secret intelligence and/or classified information is not necessarily available in the acute phases of a crisis.

Answer 1

در :  رییس قبلی اتاق بحران در دیجی رولکس ...