DENVER (AP) — Members of Congress have requested a briefing with the Colorado cantaloupe farm whose packing facility has been traced to a deadly listeria outbreak.Reps. Diana DeGette of Colorado and Henry Waxman of California earlier this month asked for a congressional hearing on the outbreak to learn how to prevent it from happening again.On Friday, they and leaders of the House Energy and Commerce Committee asked Jensen Farms in Holly preserve all documents and communications relevant to the investigation. The letter said they intend to also hear from the Centers for Disease Control and Prevention and the Food and Drug Administration in their investigation.Eric Jensen said Friday morning his family had just received the letter. He declined further comment.

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