On Sept. 30, Peruvian President Ollanta Humala and his Colombian counterpart Juan Manuel Santos and their respective cabinet ministers held a rare joint meeting in Peru's Amazon river port of Iquitos. There, they signed a binational accord to launch a joint effort to "cleanse Putumayo"—a reference to the jungle river basin that has for many years been under the virtual control of criminal enterprises. The Río Putumayo, a tributary of the Amazon, forms the border between the two countries in the lawless region. The Colombian side is a key stronghold of the FARC guerillas, which is believed to do business with the criminal gangs that operate freely on the Peruvian side. Santos said "we have common enemies, such as the narco-traffic, illegal mining and cutting of forests." (El Tiempo, Sept. 30) He did not mention that efforts at cooperation to get the Putumayo under control have been hampered by an ongoing border dispute in the area.