Michael Addis reports: "This photo was taken at 6:57 p.m. on Monday, March 7, as the International Space Station (bright white line) and the Shuttle Discovery (fainter line in bottom right corner) crossed overhead. 

"We watched until it went into the Earth's shadow at which time it disappeared from view.

"There appears to be a third satellite in the photo.  The ISS is only visible in our area until March 19.  Information is available on NASA's website."

(Thanks, Michael, and congrats to Dave Rotondi for getting the right answer!)