You seem to referring to the "Star Wars" defense dreamed of by Ronald Reagan. Although money was allocated for research, it was never developed enough to make it practical to implement. Neither Bush nor preceding presidents built a missile defense shield over the US.
It was built in 1927.......................
The pentagon was built on August 10, 1949. It was built to house almost 30,000 defense workers. It is the United States Department of Defense.
The first public armed vessel built of iron was the Michigan, launched on the Great Lakes in 1843.
The Australian aborigines
poo and wee built the bottom.
It was built for National Defense by the US Army.
Shield volcanoes are large volcanoes that are built almost entirely of fluid. Lava flows gently and continuously out of the central volcanic vent or group of vents.
National Defense purposes. Before the US entered WWII massive support was being transferred to Russia for its defense against Nazi Germany. Bases to support this effort had to be built in Alaska and the entire road network was built by Army Engineeers.
A shield volcano.
The Pentagon Building was built to house the Department of Defense
pancakes.