Hoping to rebound from their shutout loss to the Seahawks, the Rams flew to FedEx Field for a Week 2 duel with the Washington Redskins.  St. Louis trailed early as Redskins kicker Shaun Suisham got a 21-yard field goal.  In the second quarter, the Rams' deficit increased a Suisham made a 28-yard field goal.  Afterwards, St. Louis took the lead as quarterback Marc Bulger completed a 2-yard touchdown pass to wide receiver Laurent Robinson.  However, Washington got their lead again as Suisham nailed a 23-yard field goal.  From there on out, the Rams were unable to obtain further points.
Question: How many yards was the shortest field goal?
Answer: 21