Andrew Dymburt has the wicked weekend weather threatening to put a damper on the start of summer for millions in the South and Central U.S.; Perry Russom reports on the crowd of bystanders in Boston who stepped in and held a suspected carjacker after a woman was struck and killed; Selina Wang has the latest on the reflecting pool in Washington, D.C., after President Trump said the pool would likely need to be drained amid algae and paint issues; and more on tonight’s broadcast of World News