Robot-boat startup HavocAI has built 42 autonomous vessels in 18 months. And now, as the military focuses on deterring China, the company is working to finish a 100-footer by the end of the year.

A five-alarm blaze ripped through a historic Brooklyn warehouse overnight, leaving two of New York’s Bravest injured as firefighters battled the fire for nearly six hours. More than 250 FDNY personnel ...