Emmylou Harris has a long history of using music to do good works as a global citizen. In 1999, she founded the Concerts for a Landmine Free World and in 2016 brought Steve Earle, Robert Plant, and others to Philadelphia on the Lampedusa: Concerts for Refugees tour. Now the angelic-voiced country harmony singer is back with Earle, Jackson Browne, Shawn Colvin, and Lila Downs in tow for The Lantern Tour, a benefit for the Women's Refugee Commission, which raises money on behalf of migrant and refugee families at the U.S.-Mexico border. It's an everybody-on-stage-at-once acoustic evening.