I wouldn't do it today. Regarding the guy who climbed the bridge and took photos of the structural elements has no idea of what laws he can be prosecuted under today. I participated in a Florida statewide team that was deciding what was acceptable without investigation and possible prosecution under infrastructure protection measures after 911. Every State put together a team at the direction of the Feds. A lot of materials (plans, diagrams, photos, etc) and access became illegal without a permit.