From the BBC:

Manchester airport, Digital Globe/Google
Google Earth peeps into every corner of the planet
Google is in talks with India about sensitive sites viewable via the Google Earth service.

Citing security worries the Indian government has asked Google to reduce the detail in a selection of images.

The government is drawing up a list of places it considers sensitive, which is expected to include military bases and government buildings.

Many other areas in Google Earth have been blurred by governments keen to stop people seeing sensitive sites.