An incident over disputed airspace has riled up the rival powers of Japan, South Korea, and Russia.
It started when South Korea warplanes fired hundreds of warning shots at what it says was a Russian surveillance jet.
The Russian plane is said to have flown twice over an island controlled by South Korea, which calls it Dokdo.
But the island is also claimed by Japan, which calls it Takeshima, and South Korea's action has angered Tokyo.
Japan says South Korea had no right to intervene, and it should have been Japan that handled it.
Japan has tensions with both Russia and South Korea that date back generations.
Japan released these photos of four bombers that also entered South Korean airspace Tuesday -- two Russian, two Chinese.
Russia, meanwhile, maintains the flights were over neutral waters and accuses the South Korean pilots of being reckless.