The U.S. Secret Service dealt with several drone-related incidents without adjusting its protection policies or documenting why it didn't, according to a government report released Thursday.

That information may have helped illustrate the emerging threat of civilian drone use before one was used in the 2024 assassination attempt on then-candidate Donald Trump in Butler, Pennsylvania.

The report from the Government Accountability Office found delays and holes in how the Secret Service updates its policies regarding threats, and arrives after a few turbulent years for the agency charged with the president's protection.