National Border and Homeland Security Act - Amends the Immigration and Nationality Act to give state criminal alien assistance program (SCAAP) funding priority to: (1) northern or southern border states, or (2) state political subdivisions having one of the four largest populations of unlawfully present aliens for the preceding fiscal year.
Amends the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 to direct the Secretary of Homeland Security (DHS) (Secretary) to complete the required 700 mile southwest border fencing and priority-area fencing by December 31, 2015.
Amends the Secure Fence Act of 2006 to direct the Secretary, in consultation with state and local officials along the U.S.-Mexico border, to achieve operational control over U.S. international land and maritime borders by December 31, 2015.
Directs the Secretary to:
Prohibits the Secretary of the Interior and the Secretary of Agriculture (USDA) from impeding border security-related activities by the Secretary on U.S. public lands.
Amends the Homeland Security Act of 2002 to direct the Domestic Nuclear Detection Office (of DHS), in protecting the United States from a nuclear, fissile material, or radiological attack, to consider potential smuggling routes in land border areas between ports of entry, railcars entering the United States from Canada or Mexico, and private aircraft or small vessels.
Directs the Secretary to procure within one year the number of next generation portable radiation detectors (PRDs) and radioactive isotope identification devices (RIIDs) required by the Border Patrol along the southern and northern U.S. borders.
Directs the Secretary to develop within one year, and implement within two years of development, a strategic plan to detect and interdict biological and chemical weapons entering the United States.