WASHINGTON — In many ways, the assassination attempt against Donald Trump at a Pennsylvania campaign stop was a perfect storm of failings coming together that allowed Michael Thomas Crooks to climb on top of a nearby building and take eight shots at the once and future president.

One attendee was killed, two others wounded and a bullet grazed Trump’s ear July 13, 2024, before a Secret Service counter sniper opened fire on Crooks, 20, and killed him. That day jolted an already chaotic race for the White House and solidified Trump’s iconic status in his party and beyond.

It also became a turning point for the agency tasked with protecting the president. As more details emerged about what went wrong, questions multiplied: What happened to the Secret Service’s planning? Why was a rooftop with a clear line of sight to Trump left unguarded? What motivated the shooter?

A year after Butler, multiple investigations have detailed the breakdowns that day. Under a new leader hired by Trump, the agency has been pushing to address those problems, but key questions remain.

“This was a wake-up call for the Secret Service,” said retired supervisory agent Bobby McDonald, who’s now a criminal justice lecturer at the University of New Haven.

A Senate committee and federal auditing agency over the weekend released reports about the Secret Service’s actions.

Here’s a look at what went wrong, what’s been done to address problems and the questions still unanswered.

All the investigations zeroed in on a few specific problems.

The building with a clear sight line to the stage where the president was speaking only 157 yards away was left unguarded. Crooks boosted himself up there and fired eight shots with an AR-style rifle.

The Secret Service’s investigation into its own agency’s conduct said that it wasn’t that the line-of-sight risks weren’t known about ahead of time. It was that multiple personnel assessed them as “acceptable.”

Supervisors had expected large pieces of farm equipment would be situated to block the view from the building. Those ultimately weren’t placed, and staffers who visited the site before the rally didn’t tell their supervisors that the line-of-sight concerns hadn’t been addressed, the report said.

Another glaring problem: fragmented communications between the Secret Service and the local law enforcement that the agency regularly relies on to secure events.

Instead of having one unified command post with representatives from every agency providing security in the same room, there were two command posts at the rally. One investigation described a “chaotic mixture” of radio, cellphone, text and email used to communicate that day.

And a year later, the investigations are still coming.

“There were multiple, unacceptable failures in the planning and execution of the July 13 Butler rally,” said the Senate Committee on Homeland Security & Governmental Affairs in a report released Sunday.

The committee found that the agency denied “multiple requests for additional staff, assets, and resources to protect President Trump” during the presidential campaign. The committee said that included at least two requests for the Butler rally.

The agency’s former director, Kim Cheatle, last year told a House panel before she resigned that the agency didn’t deny any requests for the rally.

Another report by the Government Accountability Office requested by Republican Iowa Sen. Chuck Grassley criticized the agency’s practices for sharing threat information. That report said senior-level agency officials knew of a specific threat to Trump in the days leading up to the rally. It wasn’t specific to the rally, but it wasn’t shared with the agents or local law enforcement planning for it.

The report said the lack of information-sharing was due to the agency’s “siloed information sharing practices.”

The agency also said Sunday that following the assassination attempt, they took a “serious look” at their operations and have undergone significant reforms to address what happened that day.

The Secret Service issued a report last week about what it has done to address problems laid bare at Butler.

“Since President Trump appointed me as director of the United States Secret Service, I have kept my experience on July 13 top of mind, and the agency has taken many steps to ensure such an event can never be repeated in the future,” said Sean Curran, whom Trump tasked with leading the agency. Curran was one of the agents standing next to Trump as he was hustled off the stage after the shooting.

The agency said it had implemented 21 of the 46 recommendations made by congressional oversight bodies. The rest were either in progress or not up to the agency to implement.

So far it doesn’t appear that anyone has been or will be fired. The agency said Thursday that six staffers have been disciplined with suspensions ranging from 10 to 42 days without pay; the six were placed on restricted duty or nonoperational positions. Their identities and positions were not released.

The lack of firings has led to criticism. The Senate report said more than six people should have been disciplined and the penalties were too weak to match the severity of what happened.

Trump marked the one-year anniversary of the failed assassination attempt with family and close advisers at the FIFA Club World Cup final in New Jersey.