From the website of the USHMM:
There are no words to express our grief and shock over today’s events at the Museum, which took the life of Officer Stephen Tyrone Johns. Officer Johns, who died heroically in the line of duty, served on the Museum’s security staff for six years. Our thoughts and prayers go out to Officer Johns’s family. We have made the decision to close the Museum Thursday, June 11, in honor of Officer Johns and our flags will be flown at half mast in his memory.
May his memory be for a blessing.
"A living memorial to the Holocaust, the United States Holocaust Memorial Museum stimulates leaders and citizens to confront hatred, prevent genocide, promote human dignity, and strengthen democracy."
May we continue to fight against hatred in the world. May the mission of the USHMM continue to be undeterred.
Let us never forget.