Boeing CEO Dave Calhoun to step down in wake of 737 Max crisis

Boeing is undergoing significant leadership changes due to recent safety issues. CEO Dave Calhoun will step down by year-end, while the CEO of the commercial airlines division is leaving immediately. Chairman Larry Kellner will resign from the board in May. These changes are in response to safety concerns, including an incident involving an Alaska Airlines jet.

What is the reason behind the recent changes in Boeing's leadership?

What incident occurred in January involving an Alas Alaska Airlines jet?