Russian President Vladimir Putin took a bathyscaphe — a self-propelled bubble-shaped submarine — deep into the Black Sea on Tuesday to view remnants of a Byzantine-era shipwreck discovered just off the coast of Crimea.Putin was photographed lowering himself into the "C-Explorer" submersible alongside members of the Russian Geographical Society before descending to see the 11th-century shipwreck that was discovered by divers near Rostov-on-Don in March.