© Licensed to London News Pictures. 11/09/2021. London, UK. A member of the public looks at flowers flowers left at a memorial in Grosvenor Square in London on the 20th anniversary of the 9/11 terrorist attack. The attacks, which killed a total of 2,977 people, saw passenger jets seized by suicide attackers, flown into the Twin Towers of the World Trade Center in New York and the The Pentagon building. Photo credit: Ben Cawthra/LNP