Your Nebraska Update headlines for today, June 2, include: researchers call for review of federal nitrate standards after new findings on drinking water contamination, Western Nebraska sugar beet farmers face severe crop losses as irrigation canals run dry, Lincoln Public Schools Security Director retires after 13 years and reflects on school safety challenges and progress, retired University of Nebraska at Kearney Chancellor Doug Kristensen discusses dedication of new rural health care facility bearing his name and examines how colleges are responding to increased political scrutiny, quarantined patients at UNMC may be allowed to finish isolation in their home states.