 PLANO, Texas--BUSINESS WIRE--INTRUSION, Inc. Nasdaq:INTZ today announced that it is scheduled to join the Russell Microcap Index, effective after the U.S. market closes on June 25, 2021, according to a preliminary list of additions published by FTSE Russell on June 4, 2021. Membership in the Russell Microcap Index, which remains in place for one year, means automatic inclusion in the appropriate growth and value style indexes. FTSE Russell determines membership for its Russell indexes prim 