You've no doubt heard about the attacks on police and other law enforcement officers across the country. What seems like a wave of police-related killings has swept the nation, and as D.C. Police Chief Cathy Lanier prepares to step down and become the NFL's top security official, she worries that the constant negative narratives saturating U.S. society will draw out more threats. Lanier tells Target USA what she's trying to do prepare officers for what may be ahead.