Mark Brzezinski

Barack Obama,  Natalia Brzezinski, Mark Brzezinski...U.S. President Barack Obama, right, is greeted by U.S. Ambassador Mark Brzezinski, center, and his wife Natalia Brzezinski, left, upon his arrival at Stockholm-Arlanda International Airport, Wednesday, Sept. 4, 2013, in Stockholm, Sweden. (AP Photo/Pablo Martinez Monsivais)

Pablo Martinez Monsivais/AP

US President Barack Obama, right, is greeted by Mark Brzezinski, US ambassador, centre, and his wife Natalia Brzezinski, left, upon his arrival at Stockholm-Arlanda International Airport on Wednesday in Stockholm, Sweden