jane london has so many security cameras focused on its transportation system and than city it's called the ring of steel and something similar could be making its way across the atlantic, the mayor of new york city michael bloomberg is in london preparing to spend about $200 million to build something in new york. greg palkot is in london. greg, what does the mayor see and what did he talk about with the mayor of london? >> reporter: jane, there is a mind-boggling half a million surveillance cameras in london. mayor bloomberg wants a few more of those in new york. he met today with the mayor of london, that's boris johnson, as well as police officials here. he looked specifically at the subway system, the underground system, and in that system, there is something like 12,000 cameras, compare that to just over 2000 working cameras on the new york city subway system. terrorists targeted the london system in 2005 and