Ukraine says it shot down four Russian fighter jets on the eastern front this weekend ... Russia's biggest battlefield ...

Although the Russian aircraft remained in international air space, they entered a region beyond U.S. and Canadian sovereign air space called the Air Defense Identification Zone (ADIZ), where ...

marking the latest incident involving Russian aircraft off the coast of the U.S. state. The military operation was routine, according to the agency, which detected and tracked the planes. Although the ...