A friend of mine runs a large, well known webdev agency in India and is attending a conference in Arizona in April. His friend was planning to come as well - he

A friend of mine runs a large, well known webdev agency in India and is attending a conference in Arizona in April. His friend was planning to come as well - he owns a US based business, has a US bank account, pays US taxes, has purchased airfare, hotel, and conference tickets. He was denied a US visa because "attending a conference is not a good enough reason". My friend with the agency who has a visa is concerned he won't get thru immigration. He was planning on expanding to the US, but is has shelved those plans.