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Gunman flew drone near Trump rally site

Law enforcement sources familiar with the federal investigation into the assassination attempt on former President Donald Trump say the gunman flew a drone over a field next to the grounds where Trump's Butler, Pennsylvania rally was held on July 13. Meanwhile, Secret Service Director Kimberly Cheatle testified Monday on Capitol Hill about the shooting, calling it the "most significant operational failure" at the agency in decades. CBS News' Scott MacFarlane and Anna Schecter have the details.

Gun violence researcher on Trump shooting

According to researchers, mass shooters in the U.S. tend to fit a specific profile. University professors Jillian Peterson and James Densley compiled a database of detailed life histories of 180 U.S. mass shooters to look for early warning signs. Peterson, executive director of the Violence Prevention Project Research Center, joins CBS News to break down her findings in the wake of the assassination attempt on former President Donald Trump.

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