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Authorities have stepped in to block hundreds of G-20 Resistance Project protesters who started their march in Lawrenceville's Arsenal Park Thursday afternoon.
Fog cloaked the Pittsburgh skyline as the G-20 global summit was welcomed to town by calm, relatively empty downtown streets Thursday morning, but things turned around as the protesters gathered and began marching at about 3 p.m.
An unpermitted march at the Group of 20 summit in Pittsburgh has turned chaotic, with protesters rolling trash bins toward police and officers firing tear gas in return.