Powerful and Moving
I just went to Oklahoma City today and went to memorial for the first time. When I was a teenager, I just happened to be in Oklahoma City on a school trip the day this occured. The memorial is very moving, although I did not dare try to go through the museum because by the time I made it to the Survivor Tree, I was too emotional to continue. Guides were around the park, and were very helpful and were able to answer every question I asked them. If you do not like to do sad things, avoid this, however, this is a place I believe every citizen of Oklahoma, AND the United States should see because it is a stark example of the power of violence, and the greater powers of hope, unity, and love.
The reason the museum charges a small fee is so the museum can continue to operate. Bills have to be paid, even for a memorial, and the outdoor memorial park with the chairs is free to everyone, but the money from the museum is also used on keeping up the outdoor memorial. It is not like this is a secret, there are several signs outside, and I would assume in, that very clearly explain WHY the museum charges 10 dollars for adults (children and seniors are 6 or 7 I believe)