Big airlines stopped flying to some countries. This started on Friday. It happened because of problems. The problems are between the USA and Iran. People are worried about war. The USA might attack Iran. This makes flying unsafe.
The USA sent many ships. These ships are going to the sea. This is after strong words from the USA. USA planes also practiced. President Trump warned Iran. He said Iran would get a big answer.
Safety groups warned about danger. They said flying in Iran is unsafe. So, airlines like Lufthansa stopped flights. Flights to UAE and Saudi Arabia are changed. The airlines want people to be safe.
The USA says it wants to stop Iran's plans. But there are other problems. Iran had a strong answer to protests. This made things harder. President Trump said Iran's plans will get a strong reaction.
These flight stops hurt travel. They also hurt business. The world is watching. Airlines are being careful. They want to fly safely. The next days are important.