POLICE in Prince George’s County, Maryland, are installing cameras...to watch their cameras.Six speed cameras in Maryland have been vandalised since April, WTOP reported. The cameras cost $30,000 to $100,000 to replace, so police have started installing surveillance cameras designed to catch vandals in the act.A dozen of the new cameras will be in place by the end of the month, WTOP reported.Police call it a matter of public safety, not an attempt to generate profit.                   –MSNBC