Introduction
Imagine a brand new public access library is being built in your city. Everyone is invited to the opening day ceremony and there is a great atmosphere.
Everyone is cheering as the building opens to the public for the first time. Then you notice that there’s a set of a few steps you must climb up to get inside the building. Normally it wouldn’t be such a big deal but you happen to have broken your foot last week while playing a soccer match and you’re still in a cast.