I believe "NO". People who used to come on B1/B2 visa, used to save bucks by renewing their 6 months visa (which they get at airport) by going to CAN/MAX. Now this "KALE" president changed the rule so inorder to renew your visa (I know you have 5 year multiple but to get 6 month visa while entering US), you must travel the countries other then North and South America. Just talk with other experts also.