hype over 9/11 and 7/7

There is so much media hype over 9/11 and 7/7. Why is it so? It is true that many lives have been lost and property damaged in these incidents. But these are not any great historical events to be remembered by their dates. Further, many such bombings have taken place all over the world resulting in loss of lives and properties. Is it because 9/11 and 7/7 have taken place in USA and UK, they are being given so much importance by the media? If this is the case, the media are not playing their part correctly. They should give equal importance to all such acts!!!