Israel has promised to retaliate for Iran's massive missile attack last week. How it does so involves great risk, and could have major repercussions for the archenemies, the Middle East and the world.

Israel's options range from symbolic strikes on military targets to crippling attacks on Iran's vital oil industry or its secretive and heavily fortified nuclear program.

Sheikh Naim Qassem has been the acting head of Hezbollah since its longtime leader Sayyed Hassan Nasrallah was killed as part of an Israeli offensive that has taken out many of the group's senior officials.

Qassem made a defiant televised speech Tuesday, claiming that the group's military capabilities are intact and Israelis will only suffer further as fighting continues.