Documentary filmmaker Ken Burns reveals how his own history has been shaped by the loss of his mother Lyla when Ken was 11 years old. Go to CNN.com/allthereis to join the All There Is community, where you can share your story and watch the full conversation. | CNN

A Channel 4 documentary says DNA from a sofa in Hitler's bunker contains a marker linked to Kallmann syndrome, but experts say it's hard to evaluate the findings. CNN's Max Foster reports. | CNN International