shark advisory signs are popping up along the beaches. warning swimmers to enter the water at their own risk. a huge rocket engine salvage from the ocean floor in march has been identified as part of apollo 11. nasa officials say four numbers on the engine revealed its identity 2044. they say the digits form a serial number linked to that ground breaking space mission. and now back over to clayton. >> at least i wasn't doing something embarrassing. it wouldn't be the first time. thanks, ainsley. it's just not in the movies anymore. stores really are tracking you now through your cell phone nordstrom and these other stores admit to testing technology that follows wi-fi signals smart phones, cabella's, family dollar and american apparel. is it legal? let's ask cyber security expert morgan wright. nice to see you this morning, morgan. >> hi, clayton. >> nice to see you. is it legal? you walk into someone's store and they decide to start tracking every movement you make in their