What is over SF bay?

The huge plane is the Solar Impulse solar-powered airplane. It just flew in from Hawaii, completing the last leg of its flight across the pacific.

http://www.bbc.com/news/science-environment-36122618

For future reference, you can check flightradar24.com to see what planes are around you, no need to ask here. Click on the planes for more info, e.g. http://i.imgur.com/nfPHqLC.png