system
Given the following post, respond as if you're commenting on Reddit:
human
[CA:WS] Why did they build Project Insight in the middle of the Potomac?

Surely Shield has facilities in the Utah desert that would have been much cheaper and more secret, and also would have been better for public goodwill.
gpt
Spoilers (Obviously).  The goal for project insight was to eliminate threats to HYDRA.  Where do you think the biggest threats were going to be as soon as it was launched?  SHIELD and the several members of the US government.  Building the project in Utah might make people question why a helicarrier was headed for DC. 

Building right next to SHIELD headquarters also allowed HYDRA to ensure that the same agents that were working to infiltrate SHIELD at the top levels could also ensure that Insight was running smoothly, without having to travel back and fourth.  HYDRA was still a minority in SHIELD, so having all agents in the one place where a single strike would be most effective was important.

The Potomac was a location where the biggest threats to the success of an operational Insight were, and HYDRA wanted to be able to direct the project while infiltrating the highest ranks of SHIELD.