The Department of Defense, Homeland Security, Navy, and Border Patrol are in court seeking an injunction against trespassing on sensitive lands in Marron Valley, a protected open space preserve owned by the city of San Diego for over 100 years. The area has been heavily impacted by concertina wire, known as razor wire due to its deadly spikes, which is becoming emblematic of the U.S. and Mexico borderlands across the nation. The city has been defending land protected under agreements with the federal government through the Multiple Species Conservation Plan permitted under the endangered Endangered Species Act. Lisa Ross, chair of the San Diego Sierra Club chapter, praises the city's unusual move to aggressively defend land protected by this plan. Despite efforts to provide watering holes on the US. side of the border, wildlife often gets tangled up in the deadly wire or seek safer routes.