Dr. Mark Boslough is the Chair of the Asteroid Day Expert Panel (ADXP). He received his BS in Physics from Colorado State University in 1977 and his PhD in Applied Physics from Caltech 1983. At Sandia Labs, he has worked on many aspects of planetary impact physics, including Comet Shoemaker-Levy 9 impact models, formation of the Libyan Desert of Egypt, the 1908 Tunguska explosion, the 2008 TC3 airburst over Sudan, and impacts on Jupiter in 2010 and 2012. He served on the asteroid mitigation panel and coauthored the NRC report “Defending Planet Earth” in 2010. He provided information and simulations of airbursts for disaster scenarios for FEMA tabletop exercises in 2013 and 2014. He was the first US scientist to visit the site of the Chelyabinsk airburst, as a participant in a NOVA documentary. His simulation of that event appeared on the covers of Nature in November, 2013, and Physics Today in September, 2014.