Carpenter's comments on the safety record of the early Soviet space program.

While reading Scott Carpenter's wonderful autobiography "For spacious skies"
I noticed an interesting comment on page 312 of the hardbound copy.
Commenting on the safety record of US manned space exploration at the time
of the Mercury program, Scott writes:
"The Soviets had an abominable safety record. To this day it's not clear how
many cosmonauts, researchers. and technicians died in space-related work."
Giovanni
www.lostcosmonauts.com