US forces around Najaf seem ready to go in and overcome radical Sadr jihadi militia. Senior Shiite Ayatollah Sistani appeals to Americans to refrain from sending troops into holy city and capturing Sadr. Fighting resumes in Fallujah.Shite Radical leader Sadr told Lebanese Hizballah al Manar television that he is still ready to die to drive Americans out of Iraq. US authorities release top Sadr aide Sheikh Hajem al -Araji shortly after detaining him at news conference he was giving at Baghdad hotel.Portugal tells its citizens to leave Iraq immediately.