President Obama on San Bernardino Shooting: Mass Killings 'Just Too Easy;' FBI Investigating Shooters' Motives <br />Wednesday's attack was the most deadly mass shooting in American since the 2012 shooting at Sandy Hook Elementary School, which killed 26 people. <br /> <br />Addressing what he termed "the prevalence of these kinds of mass shootings in this country," Obama said, "It's just too easy." <br /> <br />"We're going to have to search ourselves as a society to make sure that we can take basic steps that would make it harder for individuals to get access to weapons," he said.