A year after it was taken by ISIS, the Syrian city of Palmyra was recently retaken Syrian forces backed by Russian airstrikes. Previously home to many of the world's most treasured historical sites, many artifacts were destroyed by the Islamist forces in an anti iconoclastic purge. Now, Joseph Eid, a photographer for AFP news agency who took photos of the site just two years ago, has posted before-and-after images of the damage.