Police catch people in Greece. Police catch people in France. They are looking for answers.
One man is from Greece. He is in the air force. Two other people are from China. They have secret papers.
The leaders are worried. This is a big problem. It shows a security issue.
In Greece, a man named Christos is caught. He worked with NATO. He took pictures of secret papers. He sent them to China.
In France, two young men are caught. They want military papers. They use a big antenna. Police take their things.
China wants more information. The rules need to be strong. Spies are still a threat.