Israel's Dolphin 2-class submarines are widely expected to carry nuclear-armed cruise missiles, the most survivable known element of Israel's nuclear forces.Jack Guez/Getty ImagesIsrael is one of the world's few countries armed with nukes and multiple means to deliver them.An Israeli aerospace official recently broached these "doomsday weapons.""Israel's triad remains remarkably powerful for a country its size," an aviation expert said.The prospect of a full-scale war between Israel and the powerful Hezbollah militia in Lebanon has sent tensions spiking and briefly highlighted the power of Israel's undeclared nuclear weapons.Israel is one of the world's few countries armed with nukes and multiple means to deliver them, a capability recently referenced by an Israeli official with a leading government-run aerospace manufacturer."If we understand that there is an existential danger here, and that Iran, Yemen, Syria, Iraq and all the countries of the Middle East decide that it is time to settle against us, I understand that we have the capabilities to use doomsday weapons," Yair Katz, chairman of the Israel Aerospace Industries Workers' Council, reportedly said on Saturday.He was speaking a day after Iran's United Nations mission warned that "an obliterating war will ensue" if Israel commits "full-scale military aggression" against the Iran-backed Hezbollah in Lebanon.