US Treasury Secretary Janet Yellen removes her mask as she arrives to give a press conference at Winfield House in London on June 5, 2021, after attending the G7 Finance Ministers meeting. - Finance ministers from wealthy G7 nations on June 5 pledged commitment to a global minimum corporate tax of at least 15 percent, rallying behind a US-backed plan targetting tech giants and other multinationals accused of not paying enough. (Photo by JUSTIN TALLIS / POOL / AFP)