Stockshots of Lefortovo prison in Moscow, where US journalist Evan Gershkovich is held as a Russian court extends his detention for three months, until the end of August. Gershkovich was arrested in March for alleged spying, a charge he denies. Lefortovo has housed a long list of high-profile figures and was engineered by Russia's Federal Security Service to keep detainees in near-total solitude. STOCKSHOTS