Tisha B'Av, the saddest day on the Jewish calendar. The following collection of educational material should help your observance and understanding of the day and the City it stands to mourn.
www.ou.org/yerushalayim/tishabav
Discusses the fast of the ninth of Av, a day commemorating the tragedies that have befallen the Jewish people.
www.jewfaq.org/holidayd.htm
The Virtual Beit Midrash 17 Tammuz - 9 Av Special Tisha B'Av Journal Rav Yehuda Shaviv Punishment and Hope: The Haftora for Tisha B'Av Rav Moshe Taragin Blowing Trumpets on A Fast Day: Prayer and Unity Rav Yehuda Amital Why the Temple Was Destroyed Rav Avi Baumol Tisha B'Av: A Day of Mourning, A Day of Teshuva Rav Binyamin Tabory Tearing Garments Upon Seeing the Cities of Judea Rav Moshe Taragin ...
www.vbm-torah.org/3weeks.htm
Audio Classes about Passover ...
For the Jewish people Tisha B'Av is the traditional day of mourning, not only for the destruction of the temples in Jerusalem, but for tragedies that occurred throughout their history.
holidays.bfn.org/tishabav