San Diego Explained, which airs on NBC 7/39 every Tuesday during the 6 p.m. news, is a groundbreaking joint effort by voiceofsandiego.org and NBC San Diego. We take some of our region’s most important local issues and, using whatever tools we have at hand, bring residents up to speed on the basics. If you have suggestions for something you’d like to see explained, email: sdexplained@voiceofsandiego.org