Japan 's Defense Ministry says there was no violation of flight regulations . Among the latest , on September 5 , six F-15s from Elmendorf Air Force Base , adjacent to Anchorage , Alaska , intercepted six Russian bombers about 50 miles from the northwest coast of Alaska . One plane twice flew about 2,000 feet over USS Nimitz deck , U.S. military base . U.S. Defense officials say four F / A fighter jets from the Nimitz were in the air . Japanese officials tell AP one of the planes violated their country 's airspace .
Japan 's Defense Ministry says there was no violation of flight regulations . One plane twice flew about 2,000 feet over USS Nimitz deck , U.S. military base . U.S. Defense officials say four F / A fighter jets from the Nimitz were in the air . Japanese officials tell AP one of the planes violated their country 's airspace .