As the year comes to a close, it’s time to take a look back at some of the most memorable events and images of 2016. Among the events covered in this essay (the first of a three-part photo summary of the year): the Summer Olympics held in Rio de Janeiro, Brazil, the U.S. Republican and Democratic national conventions, the Brexit campaign and vote in Great Britain, the Pulse Nightclub shootings in Orlando, Florida, and much more. See also, the Top 25 News Photos of 2016, and the Year in Photos Part 1, and coming tomorrow, Part 3. The series will comprise 120 images in all. Warning, some of the photos may contain graphic or objectionable content.