asylum in ecuador. >>> nelson mandela's health takes a turn for the worse. the anti-apartied champion and first black south african president is in critical condition at a pretoria hospital. >>> opening statements are today in the trial of george zimmerman. the neighborhood watch volunteer accused of murdering unarmed teenager trayvon martin. >> lord, help this cable to calm down. >> and without a net. tightrope daredevil nik wallenda stares down a 1,500 drop near the gorge in the grand canyon. captioning funded by cbs the "cbs morning news" for monday, june 24th, >>> this is the "cbs morning news" for monday, june 24th, 2013. good morning. good to be with you. i'm anne-marie green. well, as if the case of edward snowden didn't already look and sound like a spy novel, now the former security contractor who leaked details of a government secret surveillance program is racing around the globe in order to escape extradition to the