<p>What you're saying is true only at the undergraduate level.</p>
<p>At Berkeley, for example, about 1/3 of the college of engineering is made up of international students. </p>
<p><a href="http://ias.berkeley.edu/siss/multiple_use/Fall%202006%20Statistics.pdf%5B/url%5D">http://ias.berkeley.edu/siss/multiple_use/Fall%202006%20Statistics.pdf</a>
<a href="http://www.coe.berkeley.edu/explore/facts.html%5B/url%5D">http://www.coe.berkeley.edu/explore/facts.html</a></p>