#NPRreads is a new feature we're testing out on Twitter and on The Two-Way. The premise is simple: Correspondents, editors and producers throughout our newsroom will share pieces that have kept them reading. They'll share tidbits on Twitter using the #NPRreads hashtag, and on occasion we'll share a longer take here on the blog.
"The techniques haven't changed much. Replacing each stone is like an exercise in macro-dentistry, a root canal for the road. Clean the damaged area, fill with a custom mixture, jam the new element in place, and make sure it lines up with the rest. Use a hammer if necessary.