Cambridge Police report charging a man who was shot in what they say was a car-to-car shootout in Cambridgeport yesterday afternoon - and say they are still looking for the other car and people involved in the mid-day gunfire.

Police say two occupants of one car exchanged gunfire with the occupants of another car in the area of Chestnut and Sidney streets. An off-duty Cambridge police officer witnessed the aftermath and saw that car head towards Central Square.

He followed them until on-duty officers could pick up the pursuit - which they ended at Land Boulevard and Binney Street and arrested one occupant, Ladjuan Guichard, 20, of Roslindale, while arranging transport to a local hospital for the other, the driver, Joekeem Nelson, 23, of Cambridge, for non-fatal gunshot wounds.

Police add that one of the two threw the gun out the window on Memorial Drive and that it has been recovered.

Guichard was charged with armed assault with intent to murder, possession of a large-capacity firearm, discharging a firearm within 500 feet of a building and unlawful possession of a firearm. Police said this morning that Nelson will be charged with armed assault with intent to murder, reckless operation of a motor vehicle and failure to stop for police.

Police are continuing to search for the other car and its occupants. Anybody with information can contact police at 617-349-3300 or submit an anonymous tip by calling 617-349-3359 or by sending a text message to 847411 that starts with TIP650.

Louise Miller got a dawn look today at the Nova Scotia Christmas Tree on Boston Common - lit up last night - and the towers of the Back Bay.

Boston is looking for proposals for sort of outdoor recreational pop ups that could take place during your basic Boston winter.

The Mayor's Office of New Urban Mechanics and the the Center on the Developing Child at Harvard University are looking for "ideas for playful, temporary design installations and events throughout Boston this winter." A bit of cash is involved:

Projects could provide inclusive performances, interactive play, or civic art that incorporates winter elements. Additionally, applicants will be encouraged to submit projects that reduce stress, build lifelong learning skills, and support responsive relationships. Two projects will be selected. Each project must be temporary, implemented by early February 2019, and meet a budget of $5,000.

Ed. note for newcomers: During the infamous Winter of 2015, when people were jumping out of their second-floor windows, Hizzonah announced at a press conference that "This isn't Loon Mountain!"