<prompt> Translate the following text to EnglishKwa mujibu wa taarifa ya Rais wa Marekani iliyotolewa tarehe 22 Juni 2001 katika barua yake kwa Makamu wa Rais, Utafiti wetu umehakikishwa na 31 USC.  <response>: However, as we explained in our June 22, 2001, letter to the Counsel to the Vice President, our inquiry is authorized by 31 U.S.C. 