Egyptian President Mohammed Morsi\'s son said it\'s illegal for Egypt to strip the leader\'s two children born in the United States of their US citizenship. Morsi\'s son, Osama Morsi told the Administrative Court in Cairo his two siblings, Ahmed and Shaimaa should keep their US citizenship because it is their personal freedom, Al-Masry Al-Youm reported Sunday. Attorney Mohammed Salem filed a lawsuit to force the two children to give up their American nationality. Osama Morsi said he\'s certain the case is illegal. The Administrative Court has postponed the case until Sept. 20, Al-Masry Al-Youm reported.