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Deserts---the hot, non-polar sort---are among the harshest places on earth. The temperatures there can change from blisteringly hot to freezing cold

"cnn saturday morning." it is saturday july 14th. i'm randi kaye. egyptian security steps up its effort to find and free a kidnapped american couple and their tour guide. a staggering number of murders on the streets of chicago. 259 so far this year. we'll track how illegal weapons get into the hands of killers. and the anticipation builds for london 2012. gold medallist dominique dawes and jacqui joie ner courier si joins me. we begin with the search for two american tourists and their guides. they were kidnapped in the sinai peninsu peninsula. it's the third time american touri...

>> i just spoke to the head of security in sinai and he is very positive the situation will be resolved shortly. i also spoke to the kidnappers a couple hours ago and they confirmed that the hostages are saved. unhard. >> we'll have full details on that when we go live to cairo in a few minutes. also in egypt, secretary of state hillary clinton meeting with the country's newly elected president mohammed morsi. egypt is nowhere near settled politically. there is no cabinet, no parliament and the new president is at odds with military office here's controlled egypt after hosni mubarak ...