legislation which both created a new transportation agency and blocked freeway construction. The agency, the National Capital Transportation Administration
(原始内容存档于2019-01-25). Gonzales, Richard. Rush Begins For Contractors Who Want In On Border Wall Construction. Morning Edition. NPR. March 6, 2017 [January 27
Nicholas J. Design, Construction, and Maintenance of Structural and Life Safety Systems (NIST NCSTAR 1-1) (PDF). Final Reports of the Federal Building and Fire