The USA dropped a bomb on Nagasaki in Japan. This was in August 1945. The bomb was an atomic bomb. Its name was “Fat Man”. It killed 150,000 people.
This was 70 years ago. People commemorate this. They meet in the Nagasaki Peace Park. The park is where the bomb exploded.
The Japanese Prime Minister is there, too. He talks to people. He says that he wants a world without atomic bombs.
Difficult words: drop (to make something fall down), ago (before), commemorate (to show respect for something).