President Joe Biden and leaders of some of the world's wealthiest nations on Saturday backed a 15% global minimum corporate tax, a dramatic restructuring of the international tax system intended to make sure big companies pay their fair share. Finance ministers of almost 140 countries had already backed the tax change. Biden and other G-20 leaders came out in support of the tax during the opening session of their first in-person summit in two years. The G-20's support of the international tax package amounted to a victory of sorts for Biden, who is pushing Congress to pass a 15% minimum tax on corporate earnings to help pay for one of his key domestic plans — an ambitious package of climate change and social safety proposals. 📸: Stefan Rousseau, @gettyimages