Coke Wraps Up Biggest Ever Social Media Campaign

Coca-Cola's largest social media project ever has come to an end. The company's three "happiness ambassadors" have completed a journey of more than 275,000 miles, 186 countries and 365 days in search of happiness.

The trio -- Tony Martin, 29, a Washington , D.C. , native now teaching kindergarten in Munich; Kelly Ferris, 23, a university student from Brussels; and Antonio Santiago, 24, a university student from Mexico City -- began on Jan. 1, 2010, armed with laptops, video cameras, smartphones and the like, and set off to visit 206 countries and territories where Coca-Cola is sold. They arrived back at Coke headquarters in Atlanta Dec. 29, 2010, just before the dawn of the New Year.