By Janie Har & Hedi Mehrez Navigating broken bottles and stained sleeping bags, a mum-of-two strides through one of America’s most notorious neighbourhoods to its only public elementary school, making sure Tenderloin’s streets in San Francisco are safe for the thousands of children living in the area. “Good afternoon, happy Monday! School time. Kids will be coming soon,” Tatiana Alabsi says to two men, one slumped forward in a wheelchair and wearing soft hospital socks and one slipper. Her cheerful voice contrasts with the neighbourhood notoriously known for the homelessness on its streets and…