keep the peace in the streets. and foremost, to try to keep their families safe. i was in one man's home today. and he says, my wife and my daughter are absolutely terrified. he and his 15-year-old son are on the street the whole night trying to defend their neighborhood. they said they had guys with automatic rifles trying to attack their place as well, drew. >> thanks, fred. all of the people in central cairo essentially breaking the law. the government slapped a curfew on the city. 4:00 p.m. until 8:00 a.m. nobody allowed outside. as you just saw, plenty are people are ignoring the curfew. cnn's ivan watson was in the middle of the crowd when two things haened. the curfew time arrived and egyptian fighter jets shot across the sky. take a look. >> this is as unmistakable show of military force. fighter jets flying low over cairo's tahrir square,