The secret SALT box.

 Is this a salt box at a railroad station?

No. It is the Secure Access Linotype Transmitter. 

If you have the key, you would be able to use it!

The handprint from the Area 51 life form is here.

 The hand print of an alien held at the Area 51 Groom Lake GSA warehouse equipment shed.

Reveal: Secret US Government Unicorn hunter cyber animal

 This cyber drone coyote, made by a Silicon Valley contractor for the US Government, which does not want the world to have unicorns!