Expert driving instructors with Fairfax County Police offered News4 a rare inside look at the training they give their officers about safe driving. ⁠ ⁠ #washingtondc #maryland #virginia #pgcounty #dc #districtofcolumbia #dmv #northernvirginia #alexandriava #northernva #arlingtonva #fairfaxcounty #nova #md #mocomd #pgcountymd