Notes:

US President Barack Obama and British Prime Minister David Cameron pose for a picture with Denmark Prime Minister Helle Thorning-Schmidt next to US First Lady Michelle Obama during the memorial service of South African former president Nelson Mandela at the FNB Stadium (Soccer City) in Johannesburg on December 10, 2013. Mandela, the revered icon of the anti-apartheid struggle in South Africa and one of the towering political figures of the 20th century, died in Johannesburg on December 5 at age 95.

Roberto Schmidt / AFP Photo / Getty Images