End of an era at Apple: Tim Cook's last day as CEO
Monday marks the end of an era at Apple: Tim Cook is stepping down as CEO of the company after 15 years. 'Squawk on the Street' takes a look back at Cook's Time at Apple.

TL;DR
- Tim Cook is stepping down as Apple CEO.
- His departure marks the end of a 15-year era.
- 'Squawk on the Street' will look back at his time as CEO.