"I do not think it would be right for me to try to be the captain that steers our country to its next destination," said British Prime Minister David Cameron.
How world leaders reacted to the Brexit.
"What doesn't kill you makes you stronger," said European Council President Donald Tusk.
German Chancellor Angela Merkel said, "Let's not beat around the bush: Today marks a watershed for Europe."
French President Francois Hollande said, "The British decision is also demanding from us to become aware of deficiencies in the functioning of the EU."
President Barack Obama said, "The people of the United Kingdom have spoken, and we respect their decision."
Poland's Foreign Minister Witold Waszczykowski told Polskie Radio: "I can only give a sigh, so it's done. This is bad news for Europe, bad news for Poles."
"Hurrah for the British! Now it is our turn. Time for a Dutch referendum!" tweeted Geert Wilders, leader of the Dutch Freedom Party.
This video includes a clip from European Union and images from Getty Images.
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