Escuela Grind and Vlad In Tears have been added to select dates of Prong’s summer European tour. That trek will find the band celebrating the 31st anniversary of “Cleansing.” Tour Dates: With Vlad In Tears: 07/30 Hamburg, GER – Bahnhof Pauli 07/31 Wacken, GER – Wacken Open Air (Prong only) 08/01 Berlin, GER – Hole…