The New York World set out to answer two basic questions: How exactly do districts get gerrymandered – that is, have their boundaries manipulated to benefit a political party or group? And where is this happening in New York? The result is "Redistricting and You," an interactive guide to gerrymandering, produced with ProPublica and the Center for Urban Research. The page allows viewers to overlay the map of current New York state Senate districts and the proposed 2012 lines, just released. The guide also defines redistricting tactics -- "cracking," "kidnapping," "diluting," "dividing," "decoying" -- and shows where those tactics are allegedly being employed.