Karbala

Some reliable sources on Imam Al Husayn a.s. and the battle of Karbala

The Martyrdom of Husayn
http://www.ihsanica.com/inspiration/MartyrdomOfHusayn_V1.pdf

The History of Karbala
http://www.islamicinformationcentre.co.uk/karbala.htm

Imam Husayn and the tragedy of Karbala
http://www.islamiccentre.org/presentations/imamhussainandkarbala.pdf

Video Lecture by Shaykh Ninowy Al Husayni
http://www.youtube.com/watch?v=Un4nkFtH1mk&feature=player_embedded