Chicago Mayor Rahm Emanuel asked his fellow mayors to divest from assault weapon makers and retailers during a meeting of the U.S. Conference of Mayors this weekend. Emanuel said there is no return on investment that is worth the havoc such weapons wreak on communities.

Last week, the mayor called for a look into the city's pension funds to identify any investments Chicago has in makers and retailers in assault weapons. He has also asked other city agencies to do so as well, including the Chicago Park District, Chicago Transit Authority and the Chicago Housing Authority. Also last week, the board of the Chicago Teachers' Pension Fund voted to divest some $146,000 from two companies due to their connections with assault weapons.