Originally Posted by PhlyingRPh
But I checked into this for a colleague a month ago and at that time it appeared the only exception was when traveling FROM the U.S. and holding a valid visa. Therefore, at that time it would have been necessary to obtain a DAT visa for travel TO the U.S.
Not only is this story wrong (the current rules have been in place much longer than that), but it makes no sense. Why would an US visa be acceptable only when leaving the US?