Briefly, because it was hot, and because Boxer could use the votes of the supporters who came.
"I'm not going to talk a long time because it's warm, and I don't want anyone to ... I don't want to lose anyone here to the heat, because I need to keep you all on your feet so you can vote in November," she said.
People laughed and cheered.
Boxer is in the second day of a two-day, nine-city tour in which she is touting her support for an $862 billion federal stimulus package that she said has led to job creation in California, including an expansion at the Sacramento airport. She spoke to about 75 people in a lot on the airport grounds.
Across the street, a group of supporters of Republican rival Carly Fiorina protested, chanting and holding signs.
Airport officials were briefly concerned about the eight-foot blimp "Stop the hot air" that Fiorina staffers brought along, worried what might happen if it floated into the air above an airport. They allowed it, and Fiorina's backers kept it in control.
PHOTO CREDIT: U.S. Sen. Barbara Boxer makes her way to the podium after a tour of the new terminal construction at the Sacramento International Airport today. Hector Amezcua / firstname.lastname@example.org