"There are some people who are coming from around the world who don't yet know about all the preprations we've done to get London ready in the last seven years," he said. "I heard there's a guy called Mitt Romney who wants to know whether we're ready. Are we ready? Yes we are!"
To top it off, Johnson finished his appearance by leading the crowd in a chant of 'Yes We Can,' President Barack Obama's famous campaign slogan from 2008. Full Story »