2011.7.27
https://www.youtube.com/watch?v=Kpgtrfn1fRQ
https://www.youtube.com/watch?v=S-JuaGYmZgE
https://www.youtube.com/watch?v=NePWZbHcYh4
https://www.youtube.com/watch?v=hYpj9867TvU
https://www.youtube.com/watch?v=nWeoiPlSryQ
https://www.youtube.com/watch?v=vuQeLz_Yhm8
https://www.youtube.com/watch?v=ZPKVi5jU_9w
https://www.youtube.com/watch?v=kLf4a7WDbmY
https://www.youtube.com/watch?v=42L_H2pDrpg
https://www.youtube.com/watch?v=Pg7KxM5z-tg
https://www.youtube.com/watch?v=AenzRqvKsYA
https://www.youtube.com/watch?v=O5CJxaxi7D8
https://www.youtube.com/watch?v=HZFG8EehxBs
https://www.youtube.com/watch?v=v4UnPqNID-Y
https://www.youtube.com/watch?v=tnC5nv1QHS0