Starting on June 21 in Tucson, 311 will cross the country on its Summer Unity Tour. Matisyahu also has signed on to join 311 through August 26. The groups will add a third band to most dates, with Particle stepping in from July 4-15 during a southern stretch that extends from Austin to Memphis. Particle also will occupy itself with festival gigs, including stops at 10,000 Lakes, Dogstock, Summer Solstice Shakedown, Ashefest and others, with its next confirmed show on June 14 at the Fibark Festival in Salida, Colorado.