You need to unblock this content by setting your broser.
ブラウザーはこの内容をブロックしないように設定してください。

INFO:
When people hear the word graffiti, many no doubt think of vandalism, but these days a growing number of enthusiasts are calling it art. Rita Braver tours a N.Y. museum exhibit of graffiti, some of which is worth upwards of $100,000.
Graffiti: Art or vandalism? - CBS News