Article Photos: Gas drilling protests held in US, other countries



A man signs a petition during a global Frackdown Day calling for a moratorium on Shale Gas Drilling at Schenley Park in Pittsburgh, Saturday, Sept. 22, 2012. (AP Photo/John Heller)

A man signs a petition during a global Frackdown Day calling for a moratorium on Shale Gas Drilling at Schenley Park in Pittsburgh, Saturday, Sept. 22, 2012. (AP Photo/John Heller)