Tanks roll into Egyptian capital as army takes control . President Obama speaks to the Egyptian people after Mubarak gives an address . Mubarak says he has asked government to resign . Egyptians observe a curfew that goes into effect at 6 AM ET .
Tanks roll into Egyptian cities as army takes control . President Obama speaks to the Egyptian president after Mubarak gives an address . Mubarak says he has asked government to resign . Protesters defy a curfew that went into effect at 6 p.m. Friday .