AdvertisementTsarnaev Charged: Suspected Boston Bomber Accused Of Using WMDApril 22, 2013Mark MemmottEyder PeraltafacebookEmailA sign reading "Flying With Angels Krystle Campbell," is seen Monday as a passing MBTA bus with "Boston Strong" displayed on its message board drives through Medford, Mass. A funeral service for Campbell, one of the three people killed in the marathon bombings, was held later in the day. (EPA /LANDOV)