All photos are taken in the main synagogue in Lubavitch World Headquarters at 770 Eastern Parkway, Brooklyn, New York Thursday, the 15th yartzeit of the death of Rabbi Menachem Mendel Schneerson, the late Lubavitcher Rebbe, except the bottom photo, which is taken on the same day at the synagogue at Rebbe's grave.
Top three photos: Chabad.info.
Bottom two photos: COLLive.com.
[Hat Tip: Mr. Mo.]