Shooting at Holocaust Memorial Museum

While I am looking for reference about museum in other country, I find an interesting article about shooting at Holocaust Memorial Museum.

This article-On the Holocaust Museum Shooting-says that President Obama shocked and saddened by shooting at the U.S Holocaust Memorial Museum. And the Secretary of the Interior Ken Salazar also tell that all U.S people witnessed and act of violence and hatred in one of our world's most sacred sites of remembrance.

The accident make Stephen Tyrone Johns-a duty officer-get killed. It suppose not happened in public environment like museum. I guess we must stay alert and fight against horrible crime like this.