Lab safety crossword answers this kind of glassware is dangerous to use because it has stress points where the glass may break

The answer is chip or chipped glasswares, this type of glassware easily breaks and yet it is easy to fix but it is potentially dangerous because this type of glassware are sharp and could injure or wound a person handling it without proper guidance of having to handle it especially when it is broken.

answer; the edward snowden leaks of nsa classified material;