News Biden, other G-20 world leaders back global corporate minimum tax on Day 1 of summit October 30, 2021October 30, 2021Michael Collins, USA TODAYComments Off on Biden, other G-20 world leaders back global corporate minimum tax on Day 1 of summit The G-20 summit that opened Saturday in Rome marked the first time in two years that some of the world's most powerful leaders have met in person.