SEC. 124. UNMANNED AIRCRAFT SYSTEMS. (a) Unmanned Aircraft and Associated Infrastructure- The Secretary shall acquire and maintain unmanned aircraft systems for use on the border, including related equipment such as--
(1) additional sensors;
(2) critical spares;
(3) satellite command and control; and
(4) other necessary equipment for operational support.
(b) Authorization of Appropriations-
(1) IN GENERAL- There are authorized to be appropriated to the Secretary to carry out subsection (a)--
(A) $178,400,000 for fiscal year 2008; and
(B) $276,000,000 for fiscal year 2009.
(2) AVAILABILITY OF FUNDS- Amounts appropriated pursuant to paragraph (1) shall remain available until expended.