President Trump says he's 'not joking' about a potential third term; Greenlanders talk about suddenly being in the international spotlight; actor Finn Wolfhard on directorial debut "Hell of a Summer." ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/