ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photos by @edkashi / I’ve been on the road documenting the run-up to the U.S. election. Along the way, I met Glenn Spencer, 83, at the border wall near Sierra Vista, Arizona. Spencer, a retired systems engineer, is a self-proclaimed guardian of the U.S./Mexico border. He’s devoted a quarter century of his life to stopping illegal migrants, believing he has more effective tools than what he calls the "gimmick" of President's Trump’s border wall. He developed a surveillance system that uses technology from the oil industry, connecting seismic sensors to monitor movements in the area. #arizona #drone #borderwall #usmexicoborder #immigration」12月5日 4時37分