Lt. Baird claimed that Kilo Squad was able to overcome severe operational disadvantages in aftermath of Museum destruction.
GREATLY REDUCED VISIBILITY
Near the end of the first wave of enemies, some doors will open to let more enemies into the fight. You can only get to the collectible after the enemies open the door for you. It is the second set of doors that the enemies open; near the collectible from the previous chapter. Note that as soon as you finish the second wave of enemies is dead, the level automatically finishes and you will not be given a chance to casually search for the collectible.