Flowers are pictured St Ann's Square in Manchester, northwest England on May 25, 2017, placed in tribute to the victims of the May 22 terror attack at the Manchester Arena. Police said they arrested two men Thursday in the Manchester area in connection with the deadly bombing of an Ariana Grande pop concert, while a detained woman was released without charges. Britain has raised its terror alert to the maximum level and ordered troops to protect strategic sites after 22 people were killed in a suicide bomb attack on a Manchester pop concert. / AFP PHOTO / Oli SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images)
