The above video was just uploaded to the Internet from Israel. The two minute long siren is to commemorate the 6 million murdered in Europe for being Jews.
Here are others blogging about topics related to this observation, or the continued hatred of Jews in the world...
Elder of Ziyon "70 years ago: The boats of unwanted Jews"
Israel Matzv "Londonistan Israel Independence Day celebration canceled"
Israelly Cool "Yom Hashoah (Holocaust Remembrance Day)"
The Muqata "Two Minutes of Siren"
YID With LID "UN Racism Conference Day One-->DURBAN II TRUTH 0"