By Emma Farge and Brenna Hughes Neghaiwi GENEVA (Reuters) – A Red Cross convoy travelling to the besieged Ukrainian port of Mariupol turned around because it had become impossible to proceed with its mission to begin evacuating civilians on Friday, the International Committee of the Red Cross (ICRC) said. “They will try again on Saturday to facilitate the safe passage of civilians from Mariupol,” the ICRC said in a statement. It said the convoy returned to Zaporizhzhia northwest of the southern port “after arrangements and conditions made it impossible to proceed.” Mariupol has been encircled …