A year ago, Ryan Tseng, the head of US defense tech startup Shield AI, announced his company had turned a new page.

A year ago, Ryan Tseng, the head of US defense tech startup Shield AI, announced his company had turned a new page.

V-BAT has crashed more than 50 times over the past 18 months, a Cessna plane with a Shield AI employee and his child aboard had to take evasive action to avoid a mid-air collision…