Why do college offer need-based aid to Internationals?

<p>Mini, it seems that Harvard had 8.1% of foreign students in its 2009 class (and 2% Canucks) :)</p>

<p><a href="http://www.admissions.college.harvard.edu/prospective/applying/stats/index.html%5B/url%5D"&gt;http://www.admissions.college.harvard.edu/prospective/applying/stats/index.html&lt;/a&gt;&lt;/p>