I'm a student at a University in the UK and in the summer coming up I've arranged to do a volunteer internship for a Charity for 10 weeks. They'll be offering me no remuneration what so ever and the type of work I'll be doing is administrative.
I'm wondering what type of travel permit I'll need, I've heard some people say WVP, I've heard some say I can work on an ESTA and I've heard some people say a B-1? the latter really confusing me because I thought you had to be in business for that aha.
Any help would be much appreciated, given that it's 10 weeks of work I'll be happy to be in and out of the USA within the usual 90 days (especially since I'll have my 3rd year or Uni to get back to) so if anyone has any advice what so ever I would be so appreciative!