Here comes a background story by myself LOL. "After the successful deployment of the YF-1X 'Testament' figher, the ¦¦¦ government decided to develop an ultra-high speed, high-attitude interceptor based on the 'Testament'. The result is here, callsign 'Nightmare' as it really becomes a serious threat to other high-attitude aircraft. " So, this is my new aircraft with the help from my friend about the engine. Proceed with extreme caution when you are flying at the speed above 1300mph or you will blow up in midair. Have fun and feel free to leave a comment! And finally, don't forget to download it ;)