U.S. President Barack Obama, Canadian Prime Minister Justin Trudeau, U.S. first lady Michelle Obama and Sophie Gregoire Trudeau pose from a balcony as they take part in an arrival ceremony for Trudeau at the White House in Washington

U.S. President Barack Obama, Canadian Prime Minister Justin Trudeau, U.S. first lady Michelle Obama and Sophie Gregoire Trudeau pose from a balcony as they take part in an arrival ceremony for Trudeau at the White House in Washington

Obama, Trudeau mark better Canada ties with climate