A high level of security became a priority for the United States after the attacks of 11 September 2001. High security required cracking down on counterfeit passports. In October 2004, the production stages of this high-tech passport commenced as the U.S. Government Printing Office (GPO) issued awards to the top bidders of the program. The awards totaled to roughly $1,000,000 for startup, development, and testing. The driving force of the initiative is the U.S. Enhanced Border Security and Visa Entry Reform Act of 2002 (also known as the "Border Security Act"), which states that such smartcard identity cards will be able to replace visas. As for foreigners travelling to the U.S., if they wish to enter U.S. visa-free under the Visa Waiver Program (VWP), they are now required to possess machine-readable passports that comply with international standards. Additionally, for travellers holding a valid passport issued on or after 26 October 2006, such a passport must be a biometric passport if used to enter the U.S. visa-free under the VWP.