Simulations that incorporate machine learning-based predictions of conflict suggest large payoffs from preventive policies, including efforts to promote macroeconomic stability and growth ...

Tucson leaders have until the end of June to find money to pay for police, fire and other service needs after voters overwhelmingly rejected a 10-year sales tax hike plan.

Tucson voters deliver a decisive rejection of a 10-year tax increase to raise about $800 million mostly pay for police and fire needs.