Discuss as:

President and First Lady Obama leave Washington for Tucson memorial

The way the photographer has used a short depth of field to isolate President Obama in front of the others, in addition to their seeming to brace themselves against the wind from the chopper while he trudges onward, gives the impression - whether true or not - that the President is a man on a mission.

The political blog First Read discusses what Obama may say tonight in Tucson.