U.S. linguist and philosopher Noam Chomsky pauses while addressing the audience at the National Autonomous University's Educational Investigation Institute (UNAM) in Mexico City

 
U.S. linguist and philosopher Noam Chomsky pauses while addressing the audience at the National Autonomous University
U.S. linguist and philosopher Noam Chomsky pauses while addressing the audience at the National Autonomous University's Educational Investigation Institute (UNAM) in Mexico City in this September 21, 2009 file photo. REUTERS/Jorge Dan