The Secret Service said on Friday that "complacency" led to a gap in protection allowing a would-be assassin to fire shots at former president Donald Trump at a rally in Butler, Pa. on July 13. "Line of sight issues were acknowledged, but not properly mitigated. Issues were encountered the day of the visit with respect to line of sight concerns, but they were not escalated to supervisors. While some members of the advance team were very diligent, there was complacency on the part of others that led to a breach of security protocols," Secret Service Director Ronald Rowe said adding "These employees will be held accountable."