University of Chicago reported a large group approached a student around 10:30 p.m. as he was walking near 56th and University, outside the Regenstein Library on campus, then punched him, and stole his wallet, cell phone, and keys. A short time later, the same group attacked a second student walking nearby, before running away.

The second student was taken to the University of Chicago emergency room for treatment. The first student was not injured.

Chicago police have not said whether the robberies were linked to the vandalism.

Meantime, a large group of teens blocked traffic at the intersection of 53rd an Lake Park earlier in the night, and swarmed into Downtown Hyde Park along 53rd Street, where a family friendly Halloween festival had taken place that evening.

Police said 11 juveniles andBrian Berman

Flynt Leverett and Hillary Mann worked at the highest levels of the Bush administration as Middle East policy experts for the National Security Council. Mann conducted secret negotiations with Iran. Leverett traveled with Colin Powell and advised Condoleezza Rice. They each played crucial roles in formulating policy for the region leading up to the war in Iraq. But when they left the White House, they left with a growing sense of alarm -- not only was the Bush administration headed straight for war with Iran, it had been set on this course for years. That was what people didn't realize. It was just like Iraq, when the White House was so eager for war it couldn't wait for the UN inspectors to leave. The steps have been