New double-layer border wall that stretches from the Pacific coast into the mountains of Southern California is pushing human smugglers out to the sea as they hope to move people from Mexico to the United States by boat, according to federal authorities.

One incident in early May sparked national attention after a tiny boat carrying nearly 30 people crashed off the rocky coast of Point Loma, California, killing three people on board and leading to a massive rescue effort in which two dozen others were pulled to safety, including the smuggler. Days earlier, 21 illegal immigrants were found aboard a boat traveling north from Mexico.

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