>> reporter: well, brianna, this gentleman's name is andrew tabor.he washington institute here. he got access because he worked for a charity that he and assad's wife, osma assad ran. in this situation they say bashar al assad has badly miscalculated. he got advice from people who told him that president obama would not enforce his red line against chemical weapons use and a huge part of this mi miscalculation is driven by assad. he's partly delusional. they believe they're not doing anything wrong, that it's outside forces, namely the u.s. and israel setting them up. i spoke with andrew tabor. he's an analyst who's a handful of westerners who got access. here's what he had to say about bashar al assad's personality. >> bashar al assad, unlike his father, is quite erratic. he's quite moody. he goes from one side to the other, bouts of rationality and irrationality. that confounded all of our attempts to deal with bashar over the years. >> he couldn't say whether he thinks assad is bipolar or not. even those close to him find it difficult to read him.