a> glor: marla andrews was just wo years old when her father died serving his country.our tribute to him. >> yes. these flying medals have oak leaf clusters on them. each cluster designates 13 thssions. so that's how we know that he had 68 missions. >> glor: captain lawrence dixon's plane crashed over austria in december 1944. he was one of the tuskegee airmen, the legendary all-black pilot unit. 27 of them have never been found. nixon's wife, marla andrew's mother, wrote to the military at the time looking for answers. for more than 70 years, nothing. >> i think, like most people, the fact that you can't find out what you want to know immediately, makes you crazy. >> glor: last summer, a breakthrough. ndrews got a call from the pentagon, but they needed her sclp. t researcher discovered eyewitness reports from around the time of the crash, with enough clues to point investigators to a site where n'ey found wreckage matching dixon's plane, along with artifacts and bone fragments. they asked andrews for a d.n.a. sample. y was a match. dhat about what you've learned les s

. >> reporter: marla andrews was just 2 years old when her father died serving his country. this is your tribute to him? >> yes. these flying medals have oak leaf clusters on them. each cluster designates 13 missions. so that's how we know that he had 68 missions. >> reporter: captain lawrence dickson's plane crashed over austria in december 1944. he was one of the tuskegee airmen, the legendary all black pilot units. 27 of them have never been found. dickson's wife, marla andrews' mother, wrote to the military at the time, looking for answers. for more than 70 years, nothing. >> i think like most people, the fact that you can't find out what you want to know immediately makes you crazy. >> reporter: last summer, a breakthrough. andrews got a call from the pentagon, but they needed her help. a researcher discovered eyewitness reports from around the time of the crash with enough clues to point investigators to a site where they found wreckage matching dickson's plane, along with artifacts and bone fragments. they asked andrews for a dna sample. it was a match. what about wha