U.S. Department of Homeland Security (DHS) Secretary Michael Chertoff signed today Visa Waiver Program (VWP) Memoranda of Understanding (MOU) with Estonian Minister of Internal Affairs Juri Pihl in Tallinn, Estonia, and with Latvian Minister of Foreign Affairs Maris Riekstins in Riga, Latvia. The agreements outline security enhancements that put both countries on the path toward visa-free travel to the U.S., and possible designation as VWP members later this year.