Hezbollah chief Nasrallah targeted in Israeli airstrikes on group’s headquarters in Beirut soon after Netanyahu’s U.N. address
				
																	
								
				Source close to armed group says Nasrallah is alive; Mr. Netanyahu cuts short U.S. visit to return immediately to Israel; Pentagon declines to speculate on whether the Hezbollah leader is still alive				
			
			
			
			
						
						
						
					
		