Another afternoon of surveillance missions

Another afternoon of intense air activity over eastern Romania, near the Black Sea:

• a USN Boeing P-8A, departing from Sigonella, orbits over the Danube delta;
• a little further south, a NATO Boieng E-3A (reg. LX-N90452) is also orbiting over an aerial surveillance mission;
• a USAF Boeing RC-135W (reg. 62-4131- callsign HOMER31) is flying along the border with Moldova, monitoring much of southwestern Ukraine