Security failed at the Trump rally shooting. Here’s what went wrong.

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A series of security flaws allowed a gunman to open fire on Donald Trump at a Pennsylvania campaign rally Saturday, law enforcement experts told the Tampa Bay Times.

The shooting was the first of a president or former president in decades.

Among the concerns raised by four experts:

The FBI and Congress have launched investigations to examine the full scope of what went wrong. But law enforcement officials and consultants who have worked high-profile political events say it’s evident based on what’s known now that best practices weren’t followed.

“This is a failure of basic personal protection 101,” said Kevin Madison, a policing and