Dome

: President Trump has stated the goal for the system to be "fully operational" within his term, with an estimated initial cost of $175 billion [2, 25]. However, critics and analysts estimate the long-term cost could reach $844 billion to $1.1 trillion [16].

: These can form as "laccoliths," where hardened magma creates a triangle or dome shape between sedimentary rock layers [10]. : President Trump has stated the goal for

: It is a hollow half of a sphere [10]. Traditional masonry domes require heavy supporting walls or pendentives—inverted triangular masonry—to transition from a square base to a circular dome [12, 13]. : President Trump has stated the goal for