I have B1 visa stamped for 10yrs and my current employer has filed L1 visa for me. I have doubts on my B1 visa validity
1) Will my B1 be valid even if my L1 gets rejected?
2) Can i reuse the B1 after my L1 expires, if i get L1 stamped for 1yr?
3) Can i have both B1 and L1 at a time?

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Thanks and Regards