One of the largest pension funds in the country has announced it is divesting from all its holdings in firearms following last month’s shooting massacre in Newtown, Connecticut. The California State Teachers’ Retirement System voted unanimously Wednesday to unload its roughly $12 million investments in three gun companies, including Freedom Group, the manufacturer of the Bushmaster semi-automatic rifle that was used in the killing of 20 young children and seven adults in the Newtown rampage. Pension funds in a number of other states are considering following suit.