Originally Posted by
xxgunnerxx
How exactly did he "breach of the USSR border"? He was constantly tracked as he entered the Soviet airspace, they brought up multiple jets to see who it was
After reading the article quoted, you will se that Rust was indeed tracked for almost the whole time. What is equally clear, besides the interference with the identification officers making him friendly, is that there was no continuous or integrated air defence system.
The cross talk between sectors and between sectors and centre were difficient.