Two research studies conducted over a decade apart discovered that the major sources of conflict within project teams are:
a. Administrative procedures and budget.
b. Human resources and technical opinions.
c. Personalities and cost.
d. Schedules and project priorities.

personalities and cost

Explanation: A project team usually consist of people from different background with different personalities. Man management is one major issue a project manager has to be prepared for. It is for this reason it is pertinent that the team lead or project manager give ample time for team members to bond and know each other very well and also conduct a kick off meeting before the commencement of a project.

answer; the edward snowden leaks of nsa classified material;

it all depends on how long the hours are. i think they wouldn't approve of it. in my opinion.