opacity: mountains peeking
opacity: trres through clouds
opacity: rolling over the mountains
opacity: mountain curve
opacity: first glimpse of Philly
opacity: shipyard
opacity: US Airways
opacity: river island
opacity: sun reflect
opacity: pseudo-lomo
opacity: industry
opacity: buttons and rows
opacity: mining pit
opacity: steam and curve
opacity: tanks
opacity: wing-canal
opacity: tracks
opacity: circling in
opacity: Evanston Wildcats
opacity: gentle curve
opacity: leading to the skyline
opacity: line to Chicago
opacity: new development
opacity: down the wing to the skyline
opacity: skyline tilt
opacity: Chicago skyline
opacity: tilted Chicago
opacity: tilt-long Chicago
opacity: zoom in on Chicago
opacity: smokestack on the river