Still trying to get their first win, the Dolphins flew to Wembley Stadium for their special international interconference game against the New York Giants.  For the game, Miami was listed as the home team.  In the first quarter, the Dolphins trailed early as Giants kicker Lawrence Tynes nailed a 20-yard field goal for the only score of the period.  In the second quarter, Miami's struggles continued with N.Y. QB Eli Manning getting a 10-yard TD run, along with Tynes nailing a 41-yard field goal. In the third quarter, the 'Fins started to make a comeback as former Giants kicker Jay Feely got a 29-yard field goal for the only score of the period.  In the fourth quarter, Miami drew close as QB Cleo Lemon completing a 21-yard TD pass to rookie WR Ted Ginn, Jr.  However, New York managed to hold on to their lead for the win. With their 11th-straight loss, the Dolphins entered their bye week at 0-8.
Answer this question: How many yards difference exists between Lawrence Tynes's longest and shortest field goal?
21