king 18 rabbit built more than any other copan king, before or after him, according to william sanderswould be the time when the power of the lineage heads was at its weakest and the power of the central authority was at it's highest, the power of the king was at its highest in copan's history. keach: but even then royal power was limited, according to archaeologist and co-director of several copan excavations david webster. webster: i think power is the ability of leaders to coerce people into doing things they don't want to do. you get power like that generally in one of two ways -- by having some kind of force or threat of force behind your demands, like a military force. or you get power by having something -- land, water, some scarce resource that other people need, and you manipulate them that way. i don't think maya kings were powerful in either sense. keach: the kings ruled not so much through power but through their authority to settle disputes spearhead the common defense and control some land. they also gained enormous prestige by redistributing precious goods and by leading

for william sanders, the retreat is direct evidence of the power held by aztec kings. sanders: down below me in the flat plain of the valley of mexico is the modern town of texcoco. and that's where the king's permanent palace was located which was a very large structure according to one of the sources of the 16th century -- had several patios and several hundred rooms surrounded by an enormous wall. apparently, he decided he needed a place to get away from it all, to get away from the business of state from the cares of state, and so he built these pleasure gdens out here, three or four kilometers from his capital. only with extraordinary power can a ruler build himself something like this. it reflects the fact that the kings had hundreds of thousands of men available for labor projects of this type. it's perhaps one of the best indicators of political power that we have for the aztec period. keach: the builder of the gardens, nezahualcoyotl was one of the most famous kings in mexican history. he was an accomplished warrior but he was also a man of letters who maintain

sander. it took tennis legend serena williams, fencing champion tim morehouse and the rockettes years to masterraft. but only moments to master paying bills at chase.com. depositing checks at the atm and transferring funds on the mobile app. technology designed for you. so you can easily master the way you bank. unbelievable! toenail fungus? seriously? smash it with jublia! jublia is a prescription medicine proven to treat toenail fungus. use jublia as instructed by your doctor. look at the footwork! most common side effects include ingrown toenail, application site redness, itching, swelling burning or stinging, blisters, and pain. smash it! make the call and ask your doctor if jublia is right for you. new larger size now available. ♪ ♪ ♪ if you can't put a feeling into words, why try? at 62,000 brush movements per minute philips sonicare leaves your mouth with a level of clean like you've never felt before giving you healthier gums in just two weeks. innovation and you. philips sonicare. success starts with the right connections. introducing miracle-gro liquafeed universal feeder. turn any ho

sanders are the only candidates that have made it official there. >>> meet princess charlotte elizabeth diana of cambridge. today prince william and duchess kate announced the name of their new daughter on twitter. it's a tribute to many family members. charlotte is believed to be an homage to william's father prince charles. elizabeth after the queen, and diana after william's late mother. charlotte is also the middle name of kate's sister pippa. and elizabeth is kate's middle name as well as the middle name of kate's mother. the princess was born saturday. she is fourth in line to the throne. >>> this child thrown off a bridge in allentown. police say his mother did it. tonight the dispatch called as authorities rush to the scene. >>> here it is right here. >> oh my god. >> how amazing is that? >> i can't believe it. >> plus, a man loses his wedding ring while running the blue cross broad street run. but it's what happens next that makes him one lucky husband. >>> and rain heading our way along with temperatures nearing 90. i'm tracking storms and near record heat. ♪ i am never getting married. never. psssssh. guaranteed. yo

sanders, nbc news. >>> a british historian has made what some are calling the literary discovery of the century. mark griffith believes this drawing could be the only authentic portrait of williamface of a 33-year-old shakespeare at the height of his popularity shortly before writing hamlet. fascinating. >>> it's 8:05 now. over to savannah. >> i would have known him anywhere. i have to say. when it comes to cancer screenings there have been a lot of questions over the years. a lot of things can be confusing. the changes depend on what your doctor says. in an attempt to clarify the guidelines there is an overall list of basic advice for five deadly cancers. dr. nancy azar is going to clear it up for us. >> very quickly, the group reviewed the literature from seven different medical societies. they evaluated the screening tests based on the available literature plus evidence for or against and they came up with what they call high value advice. can you get the most benefit with the least amount of harm. >> let's start with what this group recommends for breast cancer screening. >> big in the news is when do you start. age 40 or 50? they recommend starting every two years at the a