The head of the US Secret Service announced in a Friday press conference that the agency failed to properly plan and execute its duties at former President Donald Trump’s campaign rally in Pennsylvania July 13 — and vowed that those responsible would be “held accountable.”

The Secret Service's has made its first formal attempt in describing its errors on the day of the first attempted assassination on Trump. Here's what it said.

We cannot afford to fail,” Rowe said. “This was a failure on the part of the United States Secret Service.”Start the day smarter. Get all the news you need in your inbox each morning. The lapses included multiple communications and operational failures,