; 8 U.S.C. 1103 note) is amended— (1) by amending subsection (a) to read as follows: (a) In general The Secretary of Homeland Security shall take such actions as may be necessary (including the removal of obstacles to detection of illegal entrants) to design, test, construct, install, deploy, integrate, and operate physical barriers, tactical infrastructure, and technology in the vicinity of the southwest border to achieve situational awareness and operational control of the southwest border and deter, impede, and detect unlawful activity. ; (2) in subsection (b)— (A) in the subsection heading, by striking fencing and road improvements and inserting physical barriers ; (B) in paragraph (1)— (i) in the heading, by striking fencing and inserting barriers ; (ii) by amending subparagraph (A) to read as follows: (A) Reinforced barriers In carrying out this section, the Secretary of Homeland Security shall construct a border wall, including physical barriers, tactical infrastructure, and technology, along not fewer than 900 miles of the southwest border until situational awareness and operational control of the southwest border is achieved. ; (iii) by amending subparagraph (B) to read as follows: (B) Physical barriers and tactical infrastructure In carrying out this section, the Secretary of Homeland Security shall deploy along the southwest border the most practical and effective physical barriers, tactical infrastructure, and technology available for achieving situational awareness and operational control of the southwest border.