drivers who crashed after falling asleep did not detect any signs of drowsiness before the crash

Why is it economically necessary for the east germans to build berlin wall

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality. potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english

How important is it to have a powerful army and navy? give two reasons for your answer