; (2) enhancements to test facility capacity and flexibility; and (3) such other projects as the Administrator considers appropriate to meet the goals described in subsection (a). (c) Requirements In carrying out the program under subsection (a), the Administrator shall— (1) prioritize investments in projects that enhance test and flight certification capabilities for large thrust-level atmospheric and altitude engines and engine systems, and multi-engine integrated test capabilities; and (2) ensure that no project carried out under this program shall adversely impact, delay, or defer testing or other activities associated with facilities used for Government programs, including— (A) the Space Launch System and the Exploration Upper Stage of the Space Launch System; (B) in-space propulsion to support exploration missions; or (C) nuclear propulsion testing. (d) Savings clause Nothing in this section shall preclude a NASA program, including the Space Launch System and the Exploration Upper Stage of the Space Launch System, from using the modernized test infrastructure developed under this section. 207. Indian River Bridge The Administrator, in coordination with the heads of other Federal agencies that use the Indian River Bridge on the NASA Causeway, shall develop a plan to ensure that a bridge over the Indian River at such location provides access to the Eastern Range for national security, civil, and commercial space operations. 208. Value of International Space Station and capabilities in low-Earth orbit (a) Sense of Congress It is the sense of Congress that— (1) it is in the national and economic security interests of the United States to maintain a continuous human presence in low-Earth orbit; (2) low-Earth orbit should be used as a test bed to advance human space exploration and scientific discoveries