Russia and the United States have agreed to launch a joint programme of Mars exploration, officials said here Monday after talks between the heads of the US and Russian space agencies. The two countries “have agreed to begin joint exploration of Mars and carry out joint unmanned interplanetary station flight programmes,” Sergei Gorbunov, spokesman for Russia’s Rosaviakosmos space agency, told the Interfax news agency. “In addition, it was decided that Russia can take part in US space tenders,” Gorbunov added.