Alison Thompson, a filmmaker living in New York City, was enjoying Christmas with her boyfriend in 2004 when she saw the news reports online: a 9.3-magnitude earthquake had struck the sea near Indonesia, triggering a massive tsunami that hit much of southern Asia. As she watched the death toll climb, Thompson had one thought: she had to help. A few years earlier, she had spent eight months volunteering at Ground Zero after 9/11. She'd learned then that when disaster strikes, it's not just the firemen and Red Cross who are needed - every single person can make a difference.