PHILADELPHIA - It's been a week since a deadly mass shooting on South Street completely rocked the city of Philadelphia.Three people were killed and nearly a dozen injured after gunmen opened fire on South Street as crowds gathered for a busy Saturday night.Restaurants and stores along the popular thoroughfare say they have experienced a significant decline in business since the devastating shooting, and are now asking the community for support."It was definitely a challenging week," said Nora Portugal, owner of Nora’s Kitchen on 3rd and South streets.Despite the summer weather and several events happening in the area, Potrugal says business just hasn't kept up.