I went to the FCC's website, and discovered that it's very, very confusing, and I'm quite computer savy. Took me quite a bit of time to determine where the RR license was, and I didn't find the part about the aircraft license for international travel. I got so frustrated that I gave up since I'm not planning any airplane international travel anytime soon. It's not required for domestic flight which has been stated here earlier. I'd didn't get far enough to see the fees involved, so I don't know if those quoted are correct or not.