Rainforest Action Network: Thirteen activists were arrested while staging a peaceful sit-in at the Houston TransCanada Headquarters in opposition to the Keystone XL pipeline. Dozens of Texans rallied nearby in support of the activists who risked arrest at Monday`s protest. Activists rallied across the street in Market Square Park with signs before marching to the TransCanada office and staging a sit-in in protest of the foreign oil company`s efforts to build a giant pipeline through American soil so it can export the tar...