Tribute in Light, the temporary World Trade Center Memorial, will be moving to a new location this September. Because of development at West and Vesey Streets (Tribute was set up in a parking lot there), the light installation will now be at be stationed at a parking garage near the Battery Tunnel. The News reports that the Municipal Arts Society will pay the MTA $12,000 a year for four years for the space. The MAS is also determining whether or not Tribute will shine from Ground Zero, but given the slow speed of construction, that won't be for ages.
Gothamist on the Tribute in Light, including what those things flying in the beams of light were.