Twenty years ago, many of the key environmental issues of the day, and their implications for national and global security, were too often discussed in isolation. Silo walls were rarely breached, and key players in the public and private sectors did not engage on a regular basis. Enter the Environmental Change and Security Program of the Wilson Center, an undertaking specifically designed to make connections between those that can achieve more working together than would ever be possible while acting separately. An all-star panel looks back at what's been achieved while also assessing the challenges that lie ahead.