An EU-backed project under the Western Balkans Investment Framework is working to remove 21 of the most dangerous wrecks Europe's prolonged summer heatwave has driven water levels in the Danube River to unusually low levels, revealing dozens of German warships that were deliberately sunk by retreating Nazi forces during the Second World War.Near the Serbian town of Prahovo, the receding river has exposed the rusting remains of vessels scuttled in the autumn of 1944 as German troops withdrew before the advancing Soviet Red Army. The ships were intentionally sunk to prevent military equipment from falling into enemy hands and to...