Mark Bell, Assistant Inspector General for Audit, OIG, DHS

A switch for Customs and Border Protection drives a big change at the agency for its Automated Commercial Environment. The agency transitioned from a traditional waterfall development process to an agile development strategy. Mark Bell, assistant inspector general for audit at the Homeland Security Department’s Office of Inspector General, tells In Depth with Francis Rose where CBP started and where it’s headed now with the ACE program.