today's announcement marks one more chapter in this pursuit of a safer and more helpful, more hopeful world. the thank you. god bless you. god bless the united states of america. >> there you have the president of the united states along with vice president joe biden announcing iran and world powers have agreed to a nuclear deal. united states and world powers want to make sure iran doesn't have the tools to build weapons. iran of course wants those very strong sanctions lifted. >> right. >> the key is verification to make sure they're not brewing up something in the back room something bad. >> what the president did not say. very important. we have a senior u.s. official that says how it works. if iaea wants to visit a nuclear site in iran, it submits request to iran. iran has 14 days to respond.