Follow Diaz | Act 3 - No Loose Ends Sniper: GW2 Guide
Last update: 11 May 2016
Start off by following Diaz - after a rather long trip you will reach a vantage point with a view of the bridge. It's guarded by three mercenaries. You can take care of them in two ways - the first one is sending a bullet at the two enemies standing in a straight line [90m] (Diaz will take care of the third one) and the second involves damaging the radio which will draw away the guard's attention.
Regardless of which option you choose, you should clear the area in front of you - head to the bridge. A cutscene will activate and Maddox will start shooting at you. Quickly go prone and start crawling to the other side of the bridge.
After getting to the other side, Diaz will throw a smoke grenade which will make things a bit harder for your enemy - try to quickly run through the smoke while sticking close to your companion.