Titolo: This picture taken on December 25, 2011

Descrizione: This picture taken on December 25, 2011 shows Facebook's founder and billionaire Mark Zuckerberg (2nd L) and his girlfriend Priscilla Chan (2nd R) during their private trip to Ha Long Bay in the northeastern province of Quuang Ninh. The young billionaire and his girlfriend who are the target of local media reportedly arrived to Hanoi on December 22, 2011. They are on December 26, 2011 visiting the northern mountainous tourist site of Sapa, according to local media saying the couple received a two-week long Vietnamese tourist visa. AFP PHOTO /Gia Dinh Xa Hoi Newspaper (Photo credit should read Gia Dinh Xa Hoi/AFP/Getty Images)

Crediti immagine: AFP/Getty Images - © 2011 AFP