CAPTURE THE FLAG by: Kate Messner

When a blizzard traps three strangers—Anna, José, and Henry—at a Washington, D.C. airport, they discover they share more than just a delayed flight. All three are descendants of members of the Silver Jaguar Society, a secret group dedicated to protecting priceless artifacts. When the original Star-Spangled Banner is stolen from the Smithsonian, the trio must work together to solve the mystery and recover the flag before it's lost forever.