Secret Service Director Kimberly Cheatle testifying to Congress.
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- Trump shooting was Secret Service's worst failure in decades, director says.
- Secret Service head Kimberly Cheatle declined to answer specific questions about what went wrong.
- She said an investigation would take 60 days — far longer than the 1981 Reagan shooting report.
The director of the US Secret Service admitted in a House of Representatives committee hearing Monday...