It should not take four months and pulling a lot of strings to get a visa, in particular if you have been to the US for many times, have invitations from renowned institutions etc.
I am not a scientist and I can usually enter the US on the visa waiver program but I always wonder if the latest visit was also the last, you never know. And while you get used to the usual 1- or 2-hour wait at immigration, you never know if you get selected for a secondary check or worse. As much as I like the US and being in the US, entering the US is always very unpleasant.
I am not a scientist and I can usually enter the US on the visa waiver program but I always wonder if the latest visit was also the last, you never know. And while you get used to the usual 1- or 2-hour wait at immigration, you never know if you get selected for a secondary check or worse. As much as I like the US and being in the US, entering the US is always very unpleasant.