Hillary Clinton made history this week - here are the countries that have had female heads of state for decades

Hillary Clinton clinched the Democratic nomination on Tuesday, and she's currently beating Donald Trump in many national polls.

Depending on how things shake out in the fall, the United States may very well be headed for its first woman president.

But if Clinton is elected, she'll be far from the first woman to run a country. Other nations have been smashing their highest glass ceilings for decades - here's a look at some of the most notable female leaders of the modern world.