>> i'd like us to help save the stray dogs. >> they should stop making phone books, if you don't want them. >> reporter: setting out to change the world, one petition at a time. abbie boudreau, abc news, los angeles. >> it has begun. and so, we choose mr. wells' fourth grade class. and by the way, the hollywood giant, universal studios, has invited them and other fourth graders at the school, to a screening of "the lorax," next week. we thank you for watching. we're always on at abcnews.com. and later, a special two-hour "20/20," "one moment in time: the life of whitney houston." it begins at 9:00 p.m. eastern. and david muir will be back here tomorrow. hope you have a great weekend. how did a teen-aged father get his newborn daughter past security in this hospital is in the search is underway now for the baby. >> the imminent closure of the bay bridge. will the job take three days? and hassle of taking the long