The document describes Explorer, a statistical data visualization tool developed by the Italian Ministry of Economic Development to support development policy in Italy. Explorer allows users to interactively explore multiple indicators and their trends over time to analyze differences between regions and assess progress towards policy targets. It integrates data from various sources at the regional, sub-regional, and municipal levels. The Ministry has deployed two instances of Explorer using regional economic and public services data to facilitate open debate and evaluation of development programs. A demonstration showed Explorer's ability to tell stories with data and compare performance to waste management goals. Lessons indicated guidance is needed for non-technical users and active engagement is required to encourage story sharing.