CBS News was taken inside the Secret Service's James J. Rowley Training Center in Laurel, Maryland, to see the agency's newest eyes in the sky, a fleet of military-grade drones that reimagine aerial reconnaissance in a post-Butler era.

Chuck Grassley, who requested the report, said in a statement that what occurred at the rally was the result of “a series of bad decisions and bureaucratic handicaps.”

On the one-year anniversary of the shooting at a Trump rally in Butler, Pennsylvania, the family of Corey Comperatore spoke out against the actions of the Secret Service.

Corey Comperatore's family is calling out the U.S. Secret Service, saying after a year, no one's been held accountable for his death.

One year after the attempted assassination of now-President Donald Trump at a campaign rally in Butler, Pennsylvania, the motives of shooter Thomas Matthew Crooks remain elusive, even as more details have emerged.

Republican lawmakers call for more accountability following the suspension of six Secret Service agents involved in the security failure at the Butler campaign rally.