Given the current geopolitical situation, traveling to Russia and back to the U.S. can be risky, especially for someone with dual citizenship. Russian authorities may treat your wife as a Russian citizen despite her U.S. naturalization, which could complicate her ability to leave the country. U.S. citizens are advised to reconsider traveling to Russia due to security risks and limited consular support. It's essential to check with the U.S. embassy and the airline about any travel restrictions, especially regarding layovers in Abu Dhabi, and ensure all travel documents are in order. Always stay updated on travel advisories and be prepared for potential disruptions.