I and my wife are visiting our son in US during april 2010 for 3months from there we shall visit our daughter who is in canada for 15 days,on return journey we would come back to US stay for say one month and from there back to our homecountry India.we have a US tourist visa valid for 10 years multiple entry,I would like to know if this is allowed ?and how to deal at entry point.kindly reply