The Secret Service has well-practiced protocols for securing a rally by a president or major presidential candidate, involving counterassault commandos and sniper teams in addition to the protective detail like the one that swarmed Trump at the podium and covered him with their bodies until word came that the shooter was dead.

Agents would have conducted a site "sweep" that included assessing where a sniper might position themselves. It’s been one of the most well-known threats to presidential security since President John F. Kennedy’s 1963 assassination in Dallas.

Frequent patrols.
Look at the photos that combat veteran Sean Parnell dropped, which expose the lack of objects guarding Trump’s stage.

Ignore the community note on the second tweet. Sean pointed out that security did not place anything to block that line of sight.

LOOK. Here is another picture. Taken at 6:06pm. I am to the left of the USSS agent, in the front row behind Trump.
LOOK AT THIS.
When shots rang out I immediately thought building, or water tower. But you DO NOT have to be a tactical genius to see why.
Can you see now how close... pic.twitter.com/mSzWTHyLSC

— Sean Parnell (@SeanParnellUSA) July 17, 2024

Everyone needs to see this photo to appreciate the tactical negligence that occurred during the assassination attempt on DJT. This photo was taken just minutes before the first shots were fired. DJT is oriented towards the shooter at this point.
Look in the upper left of this... pic.twitter.com/llrXNfYYTb

— Sean Parnell (@SeanParnellUSA) July 16, 2024

One red truck. Nothing else.

Rep. Jeff Duncan (R-SC) insisted every political event for presidents or Congressional candidates required "ALL windows, balconies, parking garages, and roofs with line of sight to the stage are covered and cleared."

The Secret Service did not sweep the shed.

We also learned that Crooks visited the rally site days before Trump’s rally.