The Joshua Tree National Park Association will hold a free symposium Friday, April 21, on grass root activism in the Morongo Basin. Four residents/activists will discuss how they made a difference in the Basin. The symposium starts at 7 p.m. in the Bell Center at Copper Mountain College in Joshua Tree and is open to the public. For more information, see http://www.joshuatree.org/desert-institute/lectures/black-rock-lecture-series/