Snipers, with guns at their side, scan crowds below thempublished at 22:55 British Summer Time 5 October
Bernd Debusmann Jr
Reporting from the rally in Butler
Ahead of today's rally, we heard quite a bit about the enhanced security posture of the Secret Service and other police forces who began planning for the event as long as two weeks ago.
Here at the rally, Secret Service agents are stationed both inside and outside the security perimeter, where attendees are being searched before they enter.
The wider area includes the rooftop of a glass company warehouse from where Thomas Matthew Crooks, 20, fired at Trump, narrowly missing him. One person was killed and two seriously wounded in the shooting.
Much of the security presence - such as increased drone flights - are unseen.
From what I can see, the most obvious change is the number of counter-sniper teams posted on rooftops. The ones by the back parking lot are dressed in green fatigues, identifying them as state or local officers rather than the black-clad secret service. They have been scanning the crowd, with rifles next to them resting on bipods.
There's also considerably more state troopers than when I was last here in July, mostly walking back and forth along the line of people waiting to get in.