Fig. 2From: Leveraging lessons learned to prevent future disasters—insights from the 2013 Colombia-US binational exchangeAerial photo of Armero, Colombia shows partial destruction caused by a lahar on November 13, 1985, that killed approximately 21,000 people at this site alone (see Pierson et al. 1990). Pattern of streets and building foundations are visible in the debris field at center of photo. USGS photo by R.J. Janda, 9 Dec 1985Back to article page