This is just a gratuitous Boeing 747 post.  The jets are fast disappearing from service with the major airlines but British Airways (those of you that call them British Air just stop!) has a substantial number of them left and they are due to stay around for a few more years.  This one was arriving at SFO in 2018.  It came into view across Coyote Point and headed down the approach in nice winter light.  There will come a time when they are gone so appreciate it now.  I have flown on more of them than I can recall so have plenty of happy memories of traveling on them.