Bentley: That chopper is a menace to all future aerial operations while on this job.
Murray: Yeah, it's all covered in missiles and guns and stuff.
― Describing Rajan's chopper[src]
With the drawbridge lowered, Murray needed to take down Rajan's security chopper to clear the skies for the heist.
Bentley pointed Murray to Rajan's security chopper constantly soaring above the palace grounds, describing it as a menace to any future aerial operations while on this job. He then pointed him to a nearby rusty pre-war turret. Comparing the turret to a potato gun he once had, Murray was positive it would work just as fine. After getting the turret operational, he took control of it, and a firefight between him and the chopper ensued. Eventually, the chopper fell apart, and as expected, the skies were all clear.