there are these special people who walk among us who light up the world, both inside and outside. and i remember him being one of those people. reporter: for karlj karljin keijzer, it was not about work. it was a vacation with her boyfriend. you could tell she wanted to have kids with him. they would have been the most beautiful children. they were so beautiful together and i m just glad they had each other in those moments. reporter: small comforts found in an ocean of grief. and talking with megan mcko mccormick, she says other scientists can step in and pick up where this group lefted off but the inspiration that they provided others cannot be