Alvaro Enciso is an artist. He arrived in the US from Colombia in the 1960s and now lives in Tucson, Arizona on the edge of the unforgiving Sonoran Desert. If you are a migrant, this is one of the deadliest places to journey across the border from Mexico into the United States. Many of those who begin that lengthy walk will not make it – thousands have died in the attempt. Alvaro Enciso feels a very human connection to those lives lost. So every Tuesday, he does something extraordinary. Together with a group of volunteers, Alvaro motors off-road through the dust and the cacti, and plants painted, wooden crosses in the precise locations where Undocumented Border Crossers have taken their last breaths. For Heart and Soul, Linda Pressly travels into the Sonoran Desert with Alvaro Enciso and his team. Producer & presenter: Linda Pressly Producer in Arizona: Tim Mansel (Photo: Alvaro Enciso with one of his crosses. Credit: Tim Mansel)