May 20 — Additional terrorist attacks against the United States, described as “almost certain” over the weekend by Vice President Dick Cheney, will likely include walk-in suicide bombers like those plaguing Israel and plots orchestrated by enemies other than the al-Qaida network, government officials said Monday.FBI DIRECTOR ROBERT MUELLER, speaking to a meeting of the National Association of District Attorneys in Alexandria, Va., said he considers the use of suicide bombers in the United States “inevitable.” “I think we will see that in the future,” Mueller said in response to a question after a speech. Mueller also said the degree...