blocked off some sidewalks to protect pedestrians. the mayor of d-c says she will void nearly tickets. we reported-- parking attendants ticketed drivers who left their vehicles on emergency routes during the blizzard last week. mayor muriel bowser says the ticket dismissal is a small way the city can help people recover from the snow. the city would have made more than a million-dollars on those tickets. it's been 30 years since the challenger explosion, but the memory of the