ADVANCE FOR WEEKEND EDITIONS, JULY 1-2 - In this June 16, 2017 photo, Sondra Larson, center, and other volunteers look at an aquatic plant during AIS Detector training in Brainerd, Minn. learning how to identify invasive species and avoid being fooled by look-alikes. They are the latest graduates from the AIS Detectors program, a joint project between the University of Minnesota Extension Service and the U's Aquatic Invasive Species Research Center. (Kirsti Marohn/Minnesota Public Radio via AP)
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