I just called British Airways about booking a flight for my fiance and they said he would have to have a transit visa in order to fly through Heathrow! I cant believe after all this, he has to apply for another visa? Does anyone know about this?

I don't know alot about it. here's a link to info I found. http://www.immihelp.com/visas/nonustransit.html
believe the transit visa he will need is for England since his final POE will be in USA.

National TANZANIA (UNITED REPUBLIC OF) (TZ)
Transit UNITED KINGDOM (GREAT BRITAIN) (GB)
Destination U.S.A. (US)
ALSO CHECK DESTINATION INFORMATION BELOW

UNITED KINGDOM (GREAT BRITAIN) (GB


Visa required, even in direct airside transit.

Exemptions apply when holding visas for Australia, Canada,
New Zealand, U.S.A. and E.E.A. countries (TIRGL/EEA )and
TWOV is then permitted. For information & conditions on:
- exemptions, see: For details, click here ; and
- TWOV facility, see: For details, click here .

Type of transit visa required depends on type of journey:
- if passenger is in transit with same-day, same-airport
transfer, "A-Direct Airside Transit" visa (DATV) is required.
This visa must be obtained prior to arrival in the UK and
will allow the passenger to transit between terminals at the
same UK airport as the passenger remains airside;
- if passenger is in transit and must change airport in the
U.K., or has an overnight stop in U.K., a valid U.K. visa
with any endorsement other than "Direct Airside Transit
Visa" is required;

http://www.delta.com/planning_reservations...ation/index.jsp

Thank you so much!!!!!!!!!!!!!!!! What a valuable tool. I guess he'll be flying on swissair, they wont require a stupid transit visa for zurich. thnank you thank you !

That would appear to make TWOV viable for him, since he will be holding a valid US visa - correct?

That was my reading of it as well.