[Tribune7]

They trudged for blocks to walk over a bridge, but officers wouldn't let them cross - and fired a few warning shots over their heads to convince them.

OK, why wouldn't the cops let the cross? I thought the idea was to evacuate the city?

[winodog]

If you read down to the bottom you will see where a large group of NO finest tried to cross at the same time and it was them the police were stopping. Looks like the tourists just came along at a bad time.