Irish rockers U2 will mark the 30th anniversary of their hit album “The Joshua Tree” The Joshua Tree. Every song. Every show. North America & Europe this summer. #U2TheJoshuaTree2017 Dates/Tickets https://t.co/qk6D1yWz8Z pic.twitter.com/o0GjUyNDG6— U2 (@U2) January 9, 2017 The band is set for a European and North American tour on which they will play the classic album…