Team Inj3ct0r (1337day) claim to hack Apache Tomcat Version 5.5.9 of NATO. They Leak a Backup of Random 2,646 files from Server as Proof of Hack. The archive uploaded by hackers is available at https://www.mediafire.com/?s2chp1v1v2jqsf52z. They are able to Deface the website of NATO also, but they will not do this. They have just taken the backup of server and trying to distribute that on Internet.
Source: https://thehackernews.com/2011/07/nato-server-hacked-by-1337day-inj3ct0r.html