On September 14, 2010 President Obama visited Julia R. Masterman Secondary School to give a speech to the country's students. These pictures do not show the president, but show the crowd, police, and media. The set of photos can be found here POTUS Philly visit 091410 - a set on Flickr .
Here are a few examples.
POTUS_IGP3042 by jvmphotos, on Flickr
POTUS_IGP3088 by jvmphotos, on Flickr
POTUS_IGP3108 by jvmphotos, on Flickr
Visit my flickr stream Flickr: jvmphotos' Photostream