 Some athletes named military cities requiring special permission to enter as their location and some national championships, including Olympic qualifiers, were held in cities with restricted access due to civil conflicts, preventing testing of the competitors.WADA also reported intimidation of DCOs by armed Federal Security Service (FSB) agents; "significant delays" before being allowed to enter venues; consistent monitoring by security staff; delays in receiving athlete lists; and opening of sample packages by Russian customs.90% of Russian athletes did not respond or "emphatically" refused when WADA requested to interview them as part of its investigation.