for that. >> i did, my lady. >> the prosecution also showed grask graphic photos to the court. they told pistorius to look and he refused. >> i've taken responsibility. but i will not look at a picture where i'm torment eed by what i saw and felt that night. >> emotional day. the prosecutor also had a disturbing and unexpected device for capturing the extent of the damage to reeva steenkamp's body. video of oscar pistorius shooting a watermelon. you can see him firing, and then see the incredible explosive damage to that watermelon. a vivid image for the court. nbc news correspondent mike taibbi has the latest. >> reporter: ronan, oscar pistorius showed up this morning to complete the unchallenged version of his story about why he shot and killed girlfriend