Pknotts19 Protesters in Egypt, rowdy with revolutionary fervor, dug in for an 18th day of demonstrations Friday, one day after Egyptian President Hosni Mubarak refused to step down. In a highly anticipated speech, Mubarak clung to the presidency but said he would “delegate powers” to Vice President Omar Suleiman according to the constitution — a major concession from the man who has ruled Egypt with an iron grip for 30 years.