I N THE LATE 1980s Edward Teller, the father of the hydrogen bomb, and Lowell Wood, an astrophysicist, proposed a seemingly bizarre scheme to defend America against missile attack. The “Brilliant Pebbles” system envisaged thousands of small satellites in low-Earth orbit,

President Donald Trump signed an executive order to initiate the construction of the "Iron Dome" missile defense system in the United States. This new missile defense system is expected to resemble Ronald Reagan's initiative,