NEW YORK — Saddam Hussein's regime made more than $21.3 billion in illegal revenue by subverting the U.N. Oil-for-Food program (search) through surcharges, kickbacks and smuggling oil — more than double previous estimates, according to congressional investigators. The figures are based on troves of new documents obtained by an investigative panel of the Senate Committee on Government Affairs (search), which was presenting them at a hearing Monday in Washington. The documents illustrate how Iraqi officials, foreign companies and sometimes politicians allegedly contrived to funnel vast illicit gains to the Iraqi government. The findings also reflect a growing understanding by investigators...