ECHO was MESO's second mobile lab to be added to the fleet. This 2nd-generation mobile lab built on our original prototype vehicle, McWAR (decomissioned in 2001), and included more modern equipment and rugged construction. The vehicle that became ECHO is a 1989 Ford Econoline E-350 box-style ambulance. It was decommissioned in 2006 due to excessive upkeep and operation costs.