It is possible for the United States government to implement a security model similar to the one used by other countries to monitor the behavior of individuals suspected of planning terrorist acts. However, the specifics of such a model would depend on a number of factors, including the current laws and regulations in the United States, the resources available to the government, and the level of support for such a measure among the general population. It is also important to note that any security model implemented in the United States would need to be carefully designed to balance the need for security with the need to protect individual rights and liberties