The editors of The New York Times on Tuesday compiled 42 of its most memorable front pages from last year in a new interactive section. The pages include headlines like “Upset by Gingrich Shifts G.O.P. campaign” from back in January all the way to December’s now-famous front page with the Newtown shooting victims. The pages can all be sorted by theme or by user-submitted keywords. Readers can also submit their own reactions and share their favorites via social media.