Britain's Queen Elizabeth II greets guests, after observing a minute's silence at the start of a Special Garden Party at Buckingham Palace in London on May 23, 2017. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. / AFP PHOTO / POOL / Dominic Lipinski (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)
Britain's Queen Elizabeth II and Britain's Prince Philip, Duke of Edinburgh observe a minute's silence at the start of a Special Garden Party at Buckingham Palace in London on May 23, 2017. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. / AFP PHOTO / POOL / Dominic Lipinski (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)
Britain's Queen Elizabeth II gestures as she walks, after observing a minute's silence at the start of a Special Garden Party, at Buckingham Palace in London on May 23, 2017. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. / AFP PHOTO / POOL / Dominic Lipinski (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)
Britain's Queen Elizabeth II and Britain's Prince Philip, Duke of Edinburgh join the guests after observing a minute's silence at the start of a Special Garden Party at Buckingham Palace in London on May 23, 2017. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. / AFP PHOTO / POOL AND AFP PHOTO / Niklas HALLE'N (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
Britain's Queen Elizabeth II gestures as she walks, after observing a minute's silence at the start of a Special Garden Party, at Buckingham Palace in London on May 23, 2017. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. / AFP PHOTO / POOL / Dominic Lipinski (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)
