US Presidency
1987

While we pursue these arms reductions, I pledge to you that we will maintain the capacity to deter Soviet aggression at any level at which it might occur. And in cooperation with many of our allies, the United States is pursuing the Strategic Defense Initiative, research to base deterrence not on the threat of offensive retaliation, but on defenses that truly defend; on systems, in short, that will not target populations, but shield them. By these means we seek to increase the safety of Europe and all the world. But we must remember a crucial fact: East and West do not mistrust each other because we are armed; we are armed because we mistrust each other. And our differences are not about weapons but about liberty. When President Kennedy spoke at the City Hall those 24 years ago, freedom was encircled, Berlin was under siege. And today, despite all the pressures upon this city, Berlin stands secure in its liberty. And freedom itself is transforming the globe.