A photojournalist holds up a photocopy of slain colleague Javier Valdez during a protest to call attention to the latest wave of killings of journalists, at the Angel of Independence in Mexico City, Tuesday, May 16, 2017. Valdez, an award-winning reporter who specialized in covering drug trafficking and organized crime, was slain Monday in the northern state of Sinaloa. &quot;In Mexico they are killing us,&quot; wrote a dozen reporters at the monument's base, next to, &quot;No to silence&quot;. (AP Photo/Marco Ugarte)