Colombia is hoping to expedite its mission to recover a three-century-old sunken treasure worth as much as $20 billion as the ownership of the fortune lies in legal limbo amid an ongoing court battle. President Gustavo Petro ordered his administration to exhume the “Holy Grail of shipwrecks” — the Spanish galleon San José — from the floor of the Caribbean Sea as soon as possible, the country’s minister of culture told Bloomberg last week. Petro wants to bring the 62-gun, three-masted ship to the surface before his term is up in 2026 and has requested a public-private partnership be formed...