The annual “Demo Day” event at MIT, which marks the end of the delta v startup accelerator, fell on the 25th anniversary of the Sept. 11 attacks this year, giving MIT entrepreneurs a chance to honor the memory of those lost that day while presenting their startup progress in the program.Each year, the event celebrates all that students achieved while working full-time on their ventures over the summer with support and guidance from the Martin Trust Center for MIT Entrepreneurship.But the usually boisterous night started with the program’s military veterans asking for a moment of silence.“Today is a day of remembrance, but also a day of celebration,” founder and MIT graduate student Kevin Pow...