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! 

Dvorak's own crater.

Dvorak discovered this crater when taking a break from composing music!

More details on Wikipedia.

 

The pallet storage reveals secret stash

 The pallet warehouse holds a couch that at one time stashed $3,546,180.

Anyone else has that kind of money in their furniture?

The stuff under the man's hat

 You and I know there's no rabbit under the hat. Is there a secret device?

We'll just have to wait and see.

What about this stealth warship's anchor

 The anchor looks brand new. How about that man overboard?