radiarbon dating at san lorenzo and other olmec sis hapuedack the beginning of olmec culture by more than a milleium, to circa 1,200 b.c. newsre announc: now we're off for the second phase of our exploration. obregon: stirling beganigging at san lorenzo in 1946 with the archaeologist philip dcker. stirling pugh: and sure enough, ere was a big head ana beautifully carved big head, much finer [d] more ndsome thanhe ones ata venta. obregon: stirling proposethat these enigmatic sculptures wereortraits of prominent individuals in olmec society. mostf the vast site of san lorenzo remains to be explored. new speaker: we now know atheitecove moran 300 htares, making it the laest d most complex site in mesoamerica duri t earlyressic orhearlyorma piod. obregon: the elite resided on the huge manmade plateau that dominates the site. one house, calle the "red palace," had stone columns and steps and was supplied with war channeled fromervoirs. ordinary pple may have led in the pthatched houses, li some still found ertoday. the populationncluded artisans skilled in specializedrafts. cyphers: we ha

olmec i just had a question. i was born and raised in america, and i do like our freedoms here but i also -- sharia law. registries as to why you think that jihadists want to go first people here in america but it's not necessary for to want to kill various people versus leaders of foreign policy and people that are blind injuries political conspiracies strictly speaking it's the leaders of this vast global conspiracy that is trying to attack and destroy fundamental islam. you see that in the news and media all the time to registries why is there this war against the base of islam? >> host: that's not really your expertise. >> guest: it's a little bit on what i work on. i certainly, i'm just among the people i talk to none of them expressed a desire to have a war with islam. >> host: maryland republican. >> caller: that was an interesting call. he did mention the base which is kind of apropos. fighting against the 2001 described as al-qaeda, and it seems like the recession has this cake and eat it too mentality.