Photo journal: Young Egyptian activist

After Khaled has left, other activists like Ahmed help chivvy the protesters back to the start.

He says this is a time when people are likely to get beaten up and arrested, although today is largely peaceful.

"I think we have had a little victory. This is the first time we managed to march.

"Many of these people have been beaten and badly assaulted before, but when you really want change you keep coming back."

Pictures by Sherif Sonbol.

In depth: Young in the Middle East