Detailed text transcripts for TV channel - CNN - 20110521:18:52:00
Next to your head. that is something marks and his family support. >> i still use my phone. i usually use the speaker phone or i use the headset. >> reporter: marks and his wife are urging lawmakers around the country to require manufacturers to put warnings directly on the phones. they believe having the safety information in the manual simply isn't enough. today marks is able to provide for his family again and is back on top in the real estate business. >> do you roll over or do you fight? i'm a fighter. >> we can't say for sure whether alan marks' tumor was caused by cell phones. he's cert...