Mayor Eric Adams says the NYPD will launch a full mobilization plan in the Bronx after a string of shootings left three people dead and two others injured this week. Meanwhile, police say an off-duty officer was killed in a hit-and-run on the Brooklyn-Queens Expressway when the driver of a box truck struck his motorcycle and fled the scene Wednesday. Also, the Port Authority expects a record 2.4 million passengers over Labor Day weekend and is urging air travelers to plan for long lines and delays. Finally, the National Transportation Safety Board says a fire on PATH tracks earlier this month in Jersey City was caused by electrical issues.