The regulation was crafted as part of President Barack Obama's efforts to strengthen the federal background check system in the wake of the 2012 massacre of 20 young students and six staff at Sandy Hook Elementary School in Newtown, Connecticut. Adam Lanza, a 20-year-old man with a variety of impairments, including Asperger's syndrome and obsessive-compulsive disorder, shot and killed his mother at their home, then went to school where he killed the students, adults and himself.