As Congress moves forward with immigration reform, we take a look at how this issue connects to culture, business and families in the Northwest.Our region is home to a unique blend of immigrants who work in all parts of our economy — from high-tech to agriculture. This population already has a deeply-rooted history here. And its ranks are expanding rapidly.Proposals for comprehensive immigration reform address border security, employment verification, guest-worker programs and pathway to citizenship for an estimated 11 million unauthorized immigrants in the US.