The Petersen exhibition was really something special, a gigantic collection of four years work in Stockholm. If you can go and see it. It was hard to take in all the pictures but the book will help to remember.
Another gigantic photographer was Nachtwey at Fotografiska. Its beauty and pain at the same time. The pictures are really pieces of art but the subjects are painful to look at. But we need to see it and lear how evil humans can be and hopefully make something about it.