news center, keith jones, nbc 10 news. our coverage continues in ten minutes with the impact of the attacks here in philadelphia. nbc 10 s randy gyllenhaal is talking to tourists and a tourism expert s live report is coming up in ten minute. in the meantime, 20 minutes of nonstop news continues with 7-month-old twins found dead in an apartment. they heard the mother scream for help right before police arrived. cydney long has been working this story all day. she is joining us live from the scene there. you listened to the 911 calls from this incident, what do they tell you? reporter: jim and jackie, i listened to the entire call. it goes on for six minutes. and in it, we hear the mother, we hear her voice as she s explaining to police as they arrived inside department 5105 that her twin daughters went to sleep at 6:00. but by 8:00, they weren t breathing and she tried to apply cpr before she dialed 911. reporter: investigators began to take evidence inside the f