Telemetry and commands for spacecraft at NASA fall under ITAR compliance (see http://en.wikipedia.org/wiki/International_Traffic_in_Arms_Regulations http://en.w

Telemetry and commands for spacecraft at NASA fall under ITAR compliance (see http://en.wikipedia.org/wiki/International_Traffic_in_Arms_Regulations http://en.wikipedia.org/wiki/International_Traffic_in_Arms_R...). Basically, this means that command and telemetry information must be safeguarded against access attempts by a foreign national. There are NASA employees who aren't US citizens that are not permitted to have access to this sort of information without explicit permission.