This is a group of female soldiers at Jaffa Gate. Two things are happening: First, they are learning to stand in an orderly fashion. Rows and lines aren't learned here in school, at the post office, or a restaurant; they are learned in the army. Some observers of Israeli culture would say, however, that lines are quickly forgotten immediately after a soldier is discharged. :-) In twelve years of baseball here, one of the most frustrating things was to need to repeatedly teach the players how to stand in rows and lines.
Second, the girls are touring the country, much like all the tourists just out of view who are taking pictures of them as they stand at attention. As they tour, they learn about the ancient and modern history of their country, which, to me, seems like a good thing.