Turmoil at the top of the United States military has left key posts without permanent leaders at a time when Washington is managing security challenges across Europe, the Middle East and Asia. The upheaval comes as NATO’s military chiefs meet in Copenhagen this week, raising questions about US military leadership and what the turnover could mean for its allies. James Gooderson reports for CNA from Washington DC. Subscribe to our channel here: https://cna.asia/youtubesub Visit our website: https://cna.asia Download our app: https://cna.asia/app Get our editors' picks of stories via chat apps: Telegram: https://cna.asia/telegram WhatsApp: https://cna.asia/whatsapp Follow us on these platforms: https://www.facebook.com/channelnewsasia https://www.instagram.com/channelnewsasia https://www.tiktok.com/@channelnewsasia