9mm better than .40 cal for Cops?

Sioux Falls PD moving from .40 to 9mm. The new 9's will apparently be Glocks also.  Their data suggests better accuracy, more rounds and comparable on impact and expansion.  Some disagree and this move appears to be against the trends.

British military moving to Glock 17 (9 mm)

The old Browning is history.  The Glock 17 will be the new standard sidearm.  Welcome to the 21st Century!