Links[1] http://www.denverpost.com/2016/08/03/joint-billboard/ [2] http://www.rethinkpot.org/tags/denver [3] http://www.rethinkpot.org/tags/feds [4] http://www.rethinkpot.org/tags/colorado%2A [5] http://www.rethinkpot.org/tags/car%2A