The reopening of an FBI investigation into Hillary Clinton's emailhas raised questions about whether the actioncould influence the U.S. presidential election.Last week, FBI Director James Comey announced the agencywas reviewing a new set of emails recently discovered.The emails could be important to an investigationinto Clinton's email practices that was closed earlier this year.Hillary Clinton is the Democratic candidate for president.The FBI director reportedly acted on his ownto announce the reopened investigation,after being warned by officials at the U.S. Department of Justice not to.The officials reportedly told Comey that informing Congressabout the new material was not in line with department policy.The incident raises questions about the relationshipbetween the Justice Department and FBI,and how the two agencies cooperate.The FBI generally conducts investigations for the Justice Department,which is responsible for enforcing the laws and administering justice.The FBI is an agency based in Washington D.C.It was started in 1908 by the head of the U.S. Department of Justiceat the time, Attorney General Charles J. Bonaparte.The bureau began as a special investigative forceof the Justice Department with fewer than 35 employees.Today, it remains one of many agenciescoming under the Department of Justice.It is also a member of the U.S. Intelligence Community,a grouping of 16 agencies.These agencies work separately and together on intelligence activitiesrelated to U.S. foreign relations and national security.The FBI investigates specific crimes assigned to its agents.It also provides other law enforcement agencieswith fingerprint identification services, laboratory examinations, and training.The U.S. president appoints a director for the agency.Barack Obama appointed James Comey in 2013.The appointment takes effect if the U.S. Senate confirms it.FBI directors can serve as long as ten years, but no longer.The FBI website describes the bureau as "an intelligence-drivenand threat-focused national security organizationwith both intelligence and law enforcement responsibilities."Its mission is to "protect the American peopleand uphold the United States Constitution."The FBI has 56 locations in major U.S. cities,as well as more than 60 offices around the world.It employs nearly 35,000 people.This includes special agents, intelligence experts, language specialists,scientists and information technology specialists.An act of Congress created the Department of Justice in 1870.The Attorney General heads the agency.At the time, the government faced increasing legal casesbrought against the United States.The Department of Justice website saysthe main goal of the agency is to "enforce the lawand defend the interest of the United States according to the law."Loretta Lynch currently leads the Justice Department.She took office in 2015 after President Obama nominated herand the Senate confirmed the nomination.FBI Director Comey reports to Lynch.Comey also has experience at the Department of Justice,where he served as deputy attorney general from 2003-2005.