A quote from the news yesterday.

[xiphias]

The United States lodged a formal protest against North Korea, after four of their interceptor planes attempted to drive off a US reconnasance plane. The four planes got within fifteen meters of the US plane, and locked on their weapons with radar, but, according to the US, "did not act aggressively."

I know that the North Koreans are just trying to get the US to respond, but I wonder exactly what they think radar lock-on is if not aggressive.