Officers put on gas masks, and one of them can be seen throwing a smoke canister over a barricade.

"We have used the last of the smoke canisters," the foremost Devil said.

Tyson tore a smoke canister from his own belt, pulled the pin, and rolled it a few feet away.

As I was moving around I saw a red smoke canister being thrown and guessed it would land behind the van.

I led them back to the target, switching back to the ground radio frequency and telling the colonel to have his men pop smoke canisters.

Travelling through a well and sewer system, they find a stash of smoke canisters and grenades.

Attempting to eliminate the two Congs, a smoke canister is dropped and a white vapor covers the scene.

But we can set up smoke canisters around the perimeters and hopefully stave off some of the assault.

A second stove has been added this time for smoke canisters to reinforce the signal.