10 Things to Know for Monday AP 4/1/2013 1:03:28 AM (AP) 10 Things to Know for MondayBy The Associated PressYour daily look at late-breaking news, upcoming events and the stories that will be talked about Monday:1. GUNNED-DOWN TEXAS DA KNEW HE WAS AT RISKMike McLelland told the AP that he carried a gun everywhere, even to walk his dog around town, a bedroom community for the Dallas area.2. COURT BATTLES COMING OVER ABORTION LAWSTough laws in North Dakota, Arkansas challenge the Supreme Court's Roe v. Wade decision.3. HOW TO SELL THE U.S. ON OBAMA'S HEALTH CARE LAWThe administration turned to the science of mass marketing to craft pitches aimed at convincing the uninsured.4. LONG PATH TO U.S. IMMIGRATION BILLDespite a key agreement between business and labor groups, lawmakers from both parties say negotiations aren't finished.5. WHERE MANDELA SPENT EASTERThe 94-year-old is in a hospital receiving treatment for a recurrence of pneumonia.6. WHO FACES TRIAL IN WISCONSIN TO DETERMINE SANITY IN KILLINGSAaron Schaffhausen has conceded guilt in the grisly deaths of his three girls, but maintains he's not responsible due to mental illness.7. ABBAS CLAMPS DOWN ON CRITICSThe Palestinian leader's government in the West Bank has interrogated, prosecuted, even jailed journalists and bloggers for allegedly `defaming' him.8. THESE WORKPLACES INCLUDE BIKE SHOPS, LEGO STATIONS, ARCADESThis spring, as the tech industry soars out of the Great Recession, plans are in the works for a flurry of massive, perk-laden headquarters at Yahoo, Google and other Silicon Valley companies.9. WHEN OPENING DAY IS ABOUT MORE THAN BASEBALLFor nearly 150 years, Cincinnati has celebrated the new season with parades, parties and concerts.10. FRIGHTENING INJURY EN ROUTE TO FINAL FOURLouisville's Kevin Ware breaks leg, but teammates carry on to defeat Duke and reach big dance. Michigan, Syracuse, Wichita State also punch their tickets.