Full Title: Michelle Obama talks about the 'proud burden' she and her husband carry in the White House as she remembers fallen teenager at Chicago high school graduation First Lady Michelle Obama drew on her hometown connections and personal struggles from college and the White House during a high school graduation speech to the classmates of an honor student gunned down in 2013 near the Obama family home. A boisterous crowd of thousands attended commencement for Dr. Martin Luther King Jr. College Preparatory High School on Tuesday in Chicago and heard Obama speak.The school garnered headlines when teenager Hadiya Pendleton...