[coyote11]

Alright guys, I really don't know what to do here. I came out of the train, killed all the snipers on the towers, one objective is completed, then i was asked by the ranger to go into the building when the cargo door opens, I went in, clear the buildings and then I tried to open the door in the building, I couldn't open the door, instead I got this HINT message, USE THE WHEEL TO OPEN DOORS, I didn't see no freaking wheels, I walked around the building, search for the so called "wheel", and still couldn't find it, any help would be appreciated