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.
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.
Taiwan - An island country in east Asia. China still claims to be the legitimate owner of Taiwan, while the Taiwanese government until recently claimed to be the legitimate government of the whole of China.
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.