The Globe and Mail's photo editors have selected these as some of very best wire service photos from 2012. Now you get to decide which photo comes out on top. Vote for your favourite photo and share your selection. The events range from a research mission to the Arctic, to Nik Wallenda's tightrope feat at Niagara Falls, to the capsized Costa Concordia. The photos were selected for their artistic merit, news value and ability to tell a story.