Venezuelan President Hugo Chavez is battling what is believed to be an aggressive cancer, but he has vowed to continue running for a third term in office.  The election is set for October 7.  Chavez has endured two surgeries since being diagnosed last year and traveled to Cuba again last week for a series of radiation treatments.

As Hugo Chavez arrived in Cuba for a third round of cancer treatment, his health has become the main factor in his re-election effort.