From Navy Times:

Russian pilots rattled nerves aboard the destroyer Donald Cook, buzzing within yards of the ship in the Baltic Sea. Provocative, sure. But they weren’t a credible threat.

So concludes a retired Navy commanding officer, who reviewed photos and videos from the run-ins on Monday and Tuesday, when unarmed Sukhoi Su-24 fighters flew within 1,000 feet of the ship — once coming as close as 30 feet in what U.S. officials called “simulated attacks.”  On Monday, a low-flying Russian Ka-27 Helix helicopter also appeared to take photos of the ship.

This was definitely provocative, but it doesn’t amount to a threat, said the retired frigate and cruiser CO.

Russia also intercepted a U.S. reconnaissance plane.