[GingisK]

The smile and wink:

The shape of LBJ's cheek looks like a smile as well. A man in the background is watching, not a happy face.

[Fury]

Re: 24 - a moment in time picture.

It could meant something. It could mean nothing.

Is there any video of that time?

[Churchillspirit]

Wouldn't read too much into that. The body can react in strange ways in a stressful situation.

I have a friend - a very kind and sensitive person - who laughs when she hears bad or shocking news. She cannot help it.