[ ] Random Ammo - Near the railing in the middle of the walkway.

After the first wave of Hunters, run toward the green weapon crate on the north side of the walkway.

Upgrade weapons and swap any with low ammo.

Move over the bridge on the west side of the area and get on the heliport.

Warning: A wave of Hunters will attack as soon as you step onto the heliport. Do not fight them on the heliport; run back onto the catwalk bridge and shoot them from there.

Once the waves of Hunters are gone, the next objective is to open the UAV container.

Search the area for items.

Walk toward the metal UAV container and open it on the side where Parker stands to trigger a cutscene (a non-interactive cinematic the game plays automatically).

The Random Ammo is on the ground near the metal container.

Handgun Ammo (+5) is on the northwest side of the heliport area.

To find the Handprint (22/30), run to the far west end of the heliport after fighting all waves of Hunters and step out onto the catwalk. The handprint is on the grating on the far west side of the catwalk.