In an email welcoming CDC staff back to the office weeks after a gunman fired bullets at the agency’s headquarters , acting Centers for Disease Control and Prevention Director Jim O’Neill wrote Tuesday that the agency had lost the trust of Americans and was experiencing "mission creep" that has led it to be too involved in Americans’ health decisions. In the email, dated Tuesday and obtained by ABC News, O’Neill told CDC staff he hoped their "return is going smoothly" and noted "enhanced security and repairs to the Roybal campus" in Atlanta, Georgia. He praised CDC's accomplishments from decades ago, including its combating of malaria and HIV, and noted its work this year on the measles outbreak in Texas and an Ebola outbreak in Africa. But O'Neill made clear that Health and Human Services

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