On a hot, sunny Monday in mid-July, Dr. Leana Wen stood on a sidewalk in West Baltimore flanked by city leaders: Mayor Stephanie Rawlings-Blake, interim police commissioner Kevin Davis, Rep. Elijah Cummings. Under a huge billboard with the web address dontdie.org, she proudly unveiled a 10-point plan for tackling the city's heroin epidemic. Wen, the city's health commissioner, said she aims to create a 24/7 treatment center, an emergency room of sorts for substance abuse and mental health. She spoke of targeting those most in need, starting with those in jail.