The emerging G-20 summit security complex became increasingly evident throughout Pittsburgh yesterday, as local, state and federal agencies began preparing bases of operations ahead of next week's potential tumult.

The nearly 20 high school students in a Fox Chapel Area High School conference room were from Western Pennsylvania, where many a battle has been fought in favor of trade protectionism.

But the students voted for fighting against all forms of protectionism as the top strategy for economic recovery.

Pittsburgh could provide a Kyoto moment for the G-20 nations, a historic opportunity to forge the financial framework for a new climate change agreement on reducing global greenhouse gas emissions.

Thousands of police officers, protesters and journalists will jam Downtown next week during the G-20 summit, but extensive traffic restrictions will bar most motorists from the Golden Triangle.