This is a booklouse, photo sent in by LtDan. Several bedbuggers have mistaken them for bed bug nymphs. Notice the shape of the body is elongated, with three clear segments. There’s a pronounced head.
Compare this photo from L. Sorkin and R. Mercurio of a bed bug nymph:
Both are light colored but the bed bug nymph has a less elongated body. It doesn’t look like it has a neck, whereas the booklouse does. The bed bug nymph is clear but will become red when it has fed. Thanks to reader DJR for sharing this book louse photo.