I walked a few blocks to the Harbour bridge, then climbed up the stairs to cross it. It is pretty long, and very cool. There are dozens of security cameras everywhere, with security guards who patrol in 24/7. Talking with one of them, he said they started that after 9/11. Really a nice service, though. He told me it was safe to walk there after dark, alone. More on that later. They wear glow in the dark green colored jackets you can spot a mile off. They don't really glow, but they are very bright.