Guys,

I have a question regarding B2 visa entry period after someone got the US visa. My mother has United States B2 visa stamped on Dec 21, 2009,  is there any time frame she should  enter in the USA ? She cannot enter until May 2010 because of her personal problem,  Will it going to be a problem even she make that much late ? what is the rule about it ? Does anyone know about it ? Pls help

I appreciate your help.

Thank you,

HK