In a 5-month period beginning in late 2018, two Boeing 737 Max aircraft crashed in similar circumstances, killing 343 people. Investigators determined that in each case the crash was caused by problems with flight control software unique to that aircraft model. All 737 Max aircraft were subsequently grounded, where they remain, and the story remains in the news. This podcast, a rebroadcast of a show published on March 21, 2018, looks at the increasing complexity in software, and at what can be done to reduce that complexity and increase safety.