My family members visited USA some time back on visitor visa. They got visa at Madras for 10 years multiple entry (a letter \'M\' under entries on visa stamp). They are planning to visit USA for a second trip. Do they still need to go to Madras or they can just come here bypassing visa stamping since they have 10 year multiple entry visa ? What kind of questions they face at the port of entry. I need advice from somebody who already went through this process. Please share your expierience.
Thanks.
Thanks.