This week, former US Treasury Secretary Lawrence H. Summers says that although bank profits are up, bigger risks are brewing in credit and in an unconventional US bet on Argentina’s currency. And, could Japan’s growing labor shortage finally make immigration a permanent part of its future? Plus, self-driving trucks promise to transform freight across the US and Europe, but the road to automation is not bump-free. Later, can artificial intelligence make war faster and safer without losing human control?