Hamas fighters tightened their grip in Gaza on Tuesday after carrying out public executions, defying Israel's assertion that war cannot end under US President Donald Trump's plan until the militants are disarmed. In a stark assertion of the group's return, fighters executed men they accused of collaborating with Israeli forces. In one video circulated late on Monday, Hamas fighters dragged seven men into a circle of people in Gaza City, forced them to their knees and shot them from behind. A Hamas source confirmed the authenticity of the video. Gaza residents said fighters were increasingly visible on Tuesday, deploying along routes needed for aid deliveries. Palestinian security sources say dozens of people have been killed in clashes between Hamas fighters...