Interesting potential issue with booking ex-Khartoum. RJ is the only OW carrier operating into there and AA is the ticketing carrier for RJ, but Sudan is an embargoed country for U.S. companies and, I think, that would prevent AA from issuing a ticket ex-Sudan, mcuh like they cannot issue a ticket with Cuba in the intinerary. I tried a dummy booking ex-Khartoum and took it all the way to the CC page and it looked like it would go through, but I don't know if it actually would have.