A recording released by the federal government appears to include audio of the implosion of the experimental submersible that went missing on its way to the wreck of the Titanic.

Overall, the Top 100 Design-Build Firms had a total revenue of $107.15 billion in 2017, up 4.0% from 2016. However, revenue from domestic DB projects grew a robust 9.6%, rising to $84.35 billion ...