Like others sorry to hear about the theft. Unfortunately, you will have probably have no recourse with the TSA for your cameras as they will probably claim the theft occurred during the international portion of the flight as the bags were not seen by you while in transit (i.e. when they arrived in EWR). You might get the TSA to buy to new locks but that will be little consolation.
You will have better luck claiming theft happened on the international portion of the trip with airline. They will probably try to say it happened domestically because there was a TSA inspection which removes their liability.
http://www.continental.com/web/en-US...liability.aspx
http://www.continental.com/web/en-US...e/fragile.aspx
The list of crap the airlines will not take responsibility for is long ...