B2 Visa validity

krosswindz

Registered Users (C)
My parents hold a 10 year multiple entry B2 visa. The last time they came to the US was in 2001 and they havent visited the US till now. Do they have to do anything to make sure that their visa is valid. I heard from someone that their parents were refused entry because they hadnt visited the US for a long time even when their visa was still valid. Can any please reply asap as I need to confirm their ticket reservation tomorrow. Thanks in advance.
 
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