Description:Venezuelan President Hugo Chavez will miss Thursday's (January 10) scheduled swearing-in ceremony for his third term due to health problems, the government said in a letter to Congress read out on Tuesday (January 8). Chavez has not been heard from since undergoing his fourth cancer surgery in Cuba on December 11, and officials have described his condition as delicate. The constitution says the president should begin a new term on Jan. 10.(1:19)