middle east policy makers from the obama and bush administrations, dennis ross, steve hadly and elliot abrams. it will be moderated by our own scholar. in the afternoon, i'll moderate our second and final panel when will explore the impliyations and how it effects the other nations of the arab spring, let us begin, i want to produce monica duffy tuft who will moderate the first panel. she is an associate professor in the kennedy school of law. professor toft is the coauthor with tim shaw and danielphilpot of the boom "god's century." she is also with professor's shaw and philpot, a member of our scholars team. >> this morning we have been tasked with investigating the space of religious extremism. and the degree to the which the exclusion or inclusion of religious actors and political parties in the political process provokes violence. so i'm joined by three panelists and we will move from the more general, and she is an author of -- price of freedom denied, religious conflict in the 21st century and a head of a doctoral committee. he has written suicide bombers in iraq, and the third, kwh i

archaeologist elliot abrams and two stone masons climb to an ancient maya quarry site. abrams is trying to calculate just how much labor the king had under his command. how many workers were required to build the palace of 18 rabbit ? abrams: it would be wonderful to observe mayan indians building the structures that they built at copan. of course, that's impossible, so we have to set up experiments which replicate the behaviors as best as possible. keach: abrams times each of the construction phases as the maya might have performed them. knowing the maya used only stone tools, abrams estimates that two people could quarry over 3,000 pounds of rock in a day. he times the other processes, like transportation, knowing that the maya had no wheels or draft animals. abrams also times the manufacture of the blocks and construction of part of a wall. five cubic feet takes 80 minutes. by measuring all the walls in a building, abrams estimates the time needed to complete the masonry. he then adds this figure to the times for other processes like back-filling dirt behind the wall

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