About

Plans

By GIRAUD Patrick (Own work) [CC BY-SA 2.5 (http://creativecommons.org/licenses/by-sa/2.5)], via Wikimedia Commons

In action

By Chris Brown (originally posted to Flickr as Marathon Runners) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

Start

By Loozrboy from Toronto, Canada (Stacks Uploaded by Skeezix1000) [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons

Support

By Adam Shattock (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons