Fallout 3 problems

If you detonate it, this city will be destroyed by you. You can see the majestic mushroom cloud from the top of Tempeny Tower, and then the city will no longer exist. You will get a room in the temporary tower as a reward.

Also, you have become a bad guy. Blowing up cities will give you a lot of notoriety.

Everyone in the city was basically dead. Only the shop owner of the supply point was still alive, but she was irradiated and became a zombie-like existence. After that, she went to UNDER WORLD where she would give you 'Survival Manual' quest.

Don’t regret the good deeds you have done. It is very meaningful to be a good person. When you become VERY GOOD, the citizens of this city will give you random items as tribute every day. Your heroic deeds will also be played on the radio, which gives you a sense of accomplishment.