The manhunt for the suspect is intensifying 24 hours after a mass shooting in Maine that left at least 18 dead; Pierre Thomas reports on the alleged gunman’s history of mental illness; Linsey Davis with the heartbroken families of the victims; and more on tonight's special edition of World News Tonight with David Muir from Lewiston, Maine. 00:00 Intro 02:36 David Muir Reporting: Communities under lockdown in Maine after mass shooting 12:42 FBI activity at home associated with suspect 14:34 Maine mass shooting suspect's mental health record under investigation 15:30 First victims identified in Maine mass shooting 17:25 Israeli tanks enter northern Gaza in "targeted raid" 18:41 U.S. says Chinese fighter jet flew within 10 feet of B-52 19:19 Man arrested for attempted break-in at RFK Jr.’s home 19:47 Winter weather alerts from Idaho to Minnesota 20:06 A final note from Lewiston, Maine ABC World News Tonight with David Muir delivers the news that matters most. Watch to get the ...