The US Supreme Court will unleash its ruling in two monumental gay-rights cases within 24 hours. According to Chief Justice Roberts, SCOTUS Blog reports, "Tomorrow at 10 a.m. will be the last day and we will release all the remaining opinions."
The cases concern the Defense of Marriage Act (United States v. Windsor) and California's Prop 8 (Hollingsworth v. Perry). Here's an excellent flow chart from the New York Times on how the court could rule in those two cases. Tune into pretty much any website on earth—at 7 a.m. Pacific Time tomorrow for the decisions.