Shuttle Discovery Lands

It was a clear blue sky today over the Tampa Bay area. We think we saw Shuttle Discovery coming in for a landing on the east coast of Florida. We were in the backyard with binoculars looking at everything in the sky shortly before the scheduled landing. Airplanes had longer wings than the space shuttle and we could usually hear the engines. The white spot that we think was the space shuttle had shorter wings, dropped down really quick, left no exhaust trail, and was quiet. When a space shuttle comes in for a landing it drops quickly like a big brick with wings. After it cleared the tree line we went inside and watched the landing on TV.