The Cipher Brief Open Source Report for Thursday, July 22, 2021

CIA Director William Burns increases agency's focus on 'Havana Syndrome' investigation; U.S. exploring sanctions on Cuban officials; EU rejects British request on Brexit modification; Wendy Sherman will visit China on her Asia tour; China refuses to accept second WHO investigation to explore 'lab leak' theory on COVID-19; Uzbekistan says no to housing Afghans in blow to U.S. efforts to protect those at risk from Taliban.