"As might be surmised from this opening volley and the title, the documentary concerns itself solely with depicting over sixty segments of the Berlin Wall that are currently in the United States, covering the breadth of the contiguous 48 states and capturing nearly every segment, though some were shot and not used. What is used comes from a motley assortment of locations, to say the least: presidential libraries, subway stations, private neighborhoods, museums, and so on. In a manner similar to one of Velez’s previous films, the masterful Manakamana (2013, co-directed with Stephanie Spray), this concept is never explicitly mentioned, aside from a few off-hand comments by Stephens during interviews. The effect, especially over the short 70-minute runtime, is first…