Another Russian provocation off the coast of Russia
As a US spy plane was "routinely" spying on Russia from the Black Sea Russians staged a heinous provocation. Radio Free Europe with the details:
A Russian military jet came within about 20 feet of a U.S. Navy Poseidon surveillance plane while it was flying in international air space over the Black Sea near Crimea, the Pentagon said on May 12.
The Russian jet was armed with six air-to-air missiles, making this episode "highly provocative," one official said, as it is very rare for a Russian jet to intercept a U.S. aircraft while visibly armed.
Otherwise, the encounter was "safe and professional," the Pentagon said.
The Russian interception, off the coast of Russia, was "safe and professional", but it was "highly provocative" because Russians at other times have not been visibly armed.
Because Russians sometimes intercept US aircraft without being 'visibly armed' they now have to do so every time, or else Pentagon will scream provocation.
PS.: A Sukhoi Su-27, like many US fighters, comes with an integrated auto-cannon. There is no such thing as an unarmed Su-27.