Hero 24/7: Maryland state troopers mentor high school explorers Hero 24/7: Alexandria firefighter gives back by helping kids with special needs Hero 24/7: Police dispatcher works to honor every officer killed in line of duty Hero 24/7: PGFD paramedic lieutenant answers the call on and off-duty Hero 24/7: Fairfax County Police bomb detection K9 volunteers as community ambassador Hero 24/7: MPD officer defends the streets of D.C. and coaches youth football