Dr. Gupta discusses Herman Cain's health, cancer survival

GOP presidential hopeful Herman Cain is known for his friendly personality and his catchy 9-9-9 tax overhaul plan.  However, there's something you may not know about Cain: he nearly died.

The former business executive survived stage 4 colon cancer that had spread to his liver.  Cain says that this was part of the reason he decided to run for president.

Dr. Sanjay Gupta joins American Morning today to give us a closer look at Cain's health and his remarkable medical history.