my brother l1b visa was rejected last year stating that he was not clear enough to speak up his specialized knowledge. when he was asked about it, he got cofused between his specialisation in languages or tools which he will be working on for this project and he started with the languages.....as the reaction of the consulated he rejected the visa, though he is very much clear on the concept of the tools for which he acquires the specialised knowledge. Now this year if he appears again for the same will his interview will be very very tough or they will consider him if he is about to tell all the things which he had missed last time. Please request your reply at the earliest as he is going to attend the interview again very soon.