U.S. President Joe Biden has called for a ceasefire in Lebanon amid escalating tensions between Israel and Hezbollah following the assassination of Hezbollah's leader, Hassan Nasrallah, by an Israeli airstrike. Despite Biden's call for de-escalation, U.S. officials have noted that Israeli troop movements suggest a potential imminent ground incursion into Lebanon. The Biden administration fears that further military action could ignite a broader regional conflict. Israeli Prime Minister Benjamin Netanyahu described Nasrallah's assassination as essential for achieving Israel's war goals, while U.S. leaders, including Biden and Vice President Kamala Harris, have supported the attack as a measure of justice. The conflict has resulted in significant casualties and displacement, with ongoing Israeli airstrikes targeting Hezbollah's command structures. Biden plans to discuss the situation with Netanyahu but has not specified the timing of their conversation.