Italian bodybuilder and the man Arnold Schwarzenegger called “my best friend,” Franco Columbu, died Friday after suffering a heart attack while swimming off the coast of Sardinia, Italy. He was 78.

Add Yahoo as a preferred source to see more of our stories on Google. FILE - In this April 26, 1986 file photo, maid of Honor Caroline Kennedy and Best Man Franco Columbu, leave St. Francis Xavier ...

Arnold Schwarzenegger is mourning the loss of the man he called his best friend -- Italian bodybuilder Franco Columbu. The 78-year-old Columbu was the best man at the wedding of Schwarzenegger and ...