Encrypted Messaging Defense Relations Crisis Communications Crisis Management Command and Control Russian Military High-Level Meetings Conflict in Ukraine US Indo-Pacific Command U.S.-China Military Relations Pentagon Operational Security Intelligence Operations Security Protocols US-China Relations Indo-Pacific Direct Lines of Communication United States-China Relations U.S.-China Relations Direct Military-to-Military Lines of Communication Avoiding Misunderstandings Drug Manufacturing Resuming Military-to-Military Communication Operational Updates Military Maneuvers Defense Industry Support Territorial Disputes Hotline Operations Hotline Communication Military Drills Border Security