What is Tasawwuf. 10/30/2011 (ENGLISH)

[http://www.youtube.com/watch?v=vpAxUTstmo0&feature=plcp&context=C445a21fVDvjVQa1PpcFNiDIIhwawZ-OC2924-UVQz2MHIqvUCJls%3D]
Shaykh Nooruddeen Durkee speaks at the Zawiya of the Green Mountain School for the Tranquality of Being and the Illumination of Hearts in Charlottesville Virginia. USA