Late Thursday night, special agents received a call to the ICE tip line regarding John Doe's possible identity.

CNN: STORY HIGHLIGHTS

Hundreds of gigantic, intricate ice and snow sculptures line both sides of the banks of the frozen Songhua River, which cuts through Harbin.

BBC: Chill out in China: Harbin��s Ice and Snow Festival

He made his initial decision at the age of seven, while waiting in line for ice cream in Wilmington, Delaware, where the family then lived.

NEWYORKER: The Operator