I encourage those traveling abroad to enroll in the State Department's STEP program, follow guidance from local authorities and the closest U.S. Embassy, and remain vigilant.
STEP Program: STEP
Travel Advisories: Worldwide Caution
Call Center information for those who need to reach Consular Affairs regarding Americans in the Middle East:
Security Updates for U.S. Citizens via the WhatsApp Channel and @TravelGov on social media.
Crisis Response and Evacuations Information: https://travel.state.gov/en/international-travel/help-abroad/crisis-response.html