what are other options travel to US if NIE rejected?

[dj_rakish]

anyone travelled via like Mexico or any other country (staying there for 2-3 days) to US when NIE got rejected?

any one have any details and detail experience on process and guidelines like vaccines requirements etc ?

All your help/info on this would be exponentially appreciated.

[correrag72]

A friend of mine ( EU ) entered in the US staying in Mexico for 15 days.