Operation Empire Challenge 2008 was a sophisticated combined anglo-empire (US,UK,AUS,CAN) space, air and ground intelligence and targeting fusion operation partly co-ordinated by US defense contractor Northrop Grunnman.
The archive contains 87 files comprising 42MB of export controlled and For Official Use Only planning documents related to the 2008 operation, and one encrypted PDF final report for 2007. Documents include detailed network plans, call signs and frequencies of U2 and other spy planes.
While many files are mundane, others are revelatory.
comment : these are also Echelon countries