Nuclear close call

Okay, imagine you have a toy that is very dangerous if it falls down or breaks. Let's call it the "bomb toy." This toy is so dangerous that if something bad happens to it, it can affect a lot of people and make them very sick.

Now imagine that there are two grown-ups who have the responsibility to take care of this toy. They have to make sure the toy stays safe all the time, and they have special rules to follow to make sure nothing bad happens to it.

One day, one of the grown-ups accidentally drops the toy, and the other grown-up thinks it's broken. They both get scared because they know how dangerous the toy can be. They start to panic and think that they are going to be in big trouble.

However, they quickly realize that they made a mistake, and the toy is not really broken. They feel very relieved and happy that nothing bad happened.

This is called a "nuclear close call." It is when people who are in charge of very dangerous weapons or technologies make a mistake, and it almost causes a disaster. Thankfully, in most cases, nothing bad happens, and people learn from their mistakes to make sure they never happen again.