five core missions The Department views its own missions as https://www.dhs.gov/our-mission "Our Mission" The Department views its own missions as five core security missions "Our Mission" https://www.dhs.gov/our-mission Three key concepts DHS our mission Department of Homeland Security "Our Mission" Department of Homeland Security "Our Mission" http://www.dhs.gov/our-mission "Our Mission" âOur Missionâ Our Mission http://www.dhs.gov/our-mission "Our Mission" responsible DHS http://www.dhs.gov/our-mission The Department of Public Security has a mission statement: "Our Mission" responsible DHS Mission Statement Department of Homeland Security