Helmuth Rosales

The Times recreated, in 3-D, the lines of sight for three countersniper teams and the would-be assassin.

A diagram of the door plug shows the locations of critical bolts that federal investigators said may have been missing or improperly installed.

The tiny granules of sand that make up the hardcourt surfaces at Flushing Meadows shape the outcome of every match.

Engineers interviewed by The New York Times pointed out several weak points in Titan that were cost-saving departures from proven submersible designs.