The White House called a travel-photo lid at 12:49.
Some name info from the White House:
Little Boy in marine uniform:
Christian Jacobs (6)
Father killed in 2011.
USMC Sargent Christopher Jacobs
From pooler: (The woman with flowers described in the earlier pool report is Brittany Jacobs as identified here. But Christian Jacobs is different from the male youth in the T-shirt described in the earlier pool report. The little boy in the uniform took a photo with POTUS prior to talking with the woman with flowers, per the White House. Your pooler didn't see this. The name of the boy in the T-shirt is unknown.)