WAssistant Secretary of State for Arms Control, Verification, and ComplianceWAssistant Secretary of State for International Security and NonproliferationWAsh CarterWJack Dyer Crouch IIWPablo DreyfusWVera KistiakowskyWJack McGeorgeWUnder Secretary of State for Arms Control and International Security AffairsWIshrat Hussain Usmani