Are we panicking? The world is watching Iran after a deadly strike by Israel. Could their fighting drag in the whole world?
How to stay calm and think about WW3
Threat: In the past few days America has ordered a carrier strike group, a fighter squadron and warships including the massive aircraft carrier USS Abraham Lincoln (above) to the Middle East. Glossary
World War One - A war that included many European countries between 1914 and 1918.
Archduke Franz Ferdinand - The heir to the throne of Austria-Hungary. He was assassinated in Sarajevo in June 1914 aged 50, which led to the start of World War One.
Hamas - A militant Palestinian organisation, which has controlled the Gaza Strip since 2007. It is listed as a terrorist organisation in the UK.
Iran - A country in Western Asia, officially called the Islamic Republic of Iran. It has a population of 84 million.
Bomb - A weapon that explodes and is used to kill or hurt people or to damage buildings.
Embarrassed - Feeling ashamed or self-conscious.
Israel - A country in the Middle East, and the only Jewish nation in the modern period. It is seen by Jews, Christians and Muslims as the Holy Land.
Experts - Someone who knows a lot about a particular subject.
Middle East - The lands around the east of the Mediterranean Sea and Arabia.
Economy - The way that money flows through a country, which affects wages and the cost of living.