The U.S. Secret Service on Friday detailed a litany of failures uncovered by its review of the attempted assassination of former President Donald Trump at a rally in July.

Shooter Thomas Matthew Crooks was able to open fire from a nearby rooftop at the outdoor event held by Republican election candidate Trump, who narrowly escaped death and suffered a wound to his right ear.

The review "identified deficiencies in the advanced planning and its implementation," Acting Director Ronald Rowe Jr. said at a press briefing.