Norwegian Cruise Line tanks 15% after warning investors it has 'substantial doubt' it can keep operating (NCLH)

· *Shares of Norwegian Cruise Lines tanked more than 15% in Tuesday morning trading after the company warned in an SEC filing that there is "substantial doubt" about its ability to continue operating as it faces a liquidity crunch.*
· *The coronavirus pandemic has sent shockwaves through the travel industry, with many cruise...