Watch: Barack Obama & Michelle light up White House Christmas tree, sing carols
Flanked by his wife, two daughters and mother-in-law, US President Barack Obama led the countdown in windy President's Park.
Dec 04, 2015, 10:16 AM ISTBarack Obama lights National Christmas Tree, calls for brotherhood
As a backdrop to the ceremony, the US flag flew at half-staff atop the White House, on Obama's orders, in remembrance of the California victims.
Dec 04, 2015, 08:10 AM IST