Billionaire Elon Musk said he paid a visit to Twitter Inc's headquarters in San Francisco on Wednesday, ahead of a court-ordered deadline to close his $44 billion deal for the social media platform.

Their head-mounted flashlights swaying in the darkness, workers at the Bodega Andres Morate vineyards resemble fireflies from a distance as they roll their wheelcarts from one vine to another cutting grape bunches at night.