of what s to come as we approach peak summer travel. the pressure the biden administration is now putting on the airlines. the dangerous new heat wave taking aim at much of the country, millions under heat alerts tonight. rob marciano standing by timing it out. the new warning from nato that the war in ukraine could drag on for years as american firepower makes it to the front lines. our team on the ground with a up-close look. will the heavy artillery make a difference in the war? the news out of italy, the oscar-winning film director detained after allegations of sexual assault. celebrations across the country commemorating this year s juneteenth national holiday marking the end of slavery in america. and led by the 95-year-old grandmother of juneteenth, opal lee. and an emotional story this father s day, the promise one dad made to his son, the dream fulfilled. announcer: from abc news world headquarters in new york, this is world news tonight. good evening