This is your WORT local news for Tuesday, May 10.* Madison gets ready to help litigation to curb gun violence…* Southern Wisconsin is under a tornado watch, and the rest of your evening weather forecast…* The union representing Madison’s teachers is suing the school district over records requests…* And in the second half, another spring semester winds down at U-W, an orphan gosling finds a new home, and interstellar rayguns light up the cosmos.