Siemens finds itself in good company in Iran. The top executive of Chinese telecom giant Huawei is awaiting extradition to the U.S. to face charges of violating sanctions. The United States has also sanctioned Chinese state-run energy company for buying Iranian oil. Satellite imagery captured Iranian tankers parked in Chinese ports. China has been called Tehran’s last-ditch lifeline.

You can be sure Washington will be watching China and the Europeans closely in the weeks ahead.