In this Christopher Caldwell's book review of Steve Coll's book, The Bin Ladens, was an interesting nugget about the ties between the Bin Ladens and American politicians especially James Baker, the Bushes, The Carlyle Group and Jimmy Carter (third paragraph):

...Muhammad bin Laden, Osama’s father, emigrated from the canyons of the Hadhramawt, in present-day Yemen, in the 1920s. He arrived in Jidda, one-eyed and semiliterate, at a time when Saudi Arabia had hardly any paved roads and the king kept his treasury in a tin trunk. Muhammad was charismatic. His workers, with whom he prayed and sang at job sites, revered him. He was scrupulously honest, as Arabian lore holds Hadhramis to be, and his company keeps this reputation still. Most important, Muhammad would serve the greedy and capricious Saudi princes in ways that Bechtel and other foreign contractors balked at — doing humiliating jobs from digging gardens to fixing air conditioners. The grateful royals made him their main palace- and highway-builder in the boom years after the war. By the time Muhammad died in a plane crash in September 1967, his company was worth an estimated $150 million, and he had fathered 54 children by about 22 wives.

Those children, Osama included, grew up in the shadow of a court society. Royal favor was all. Since the Saud family sent its sons to Princeton and Georgetown, Muhammad educated many of his own sons in the West, too, starting with Salem, his impious and ribald successor. Coll’s account of Salem is doting. When the austere King Faisal was assassinated in 1975, the sybaritic King Fahd took power. Hedonism and consumerism became for Salem what piety had been for his father: common ground with the royal family. Knowledgeable about private planes, luxury cars and new gadgetry, Salem became, as Coll puts it, a “royal concierge.”

Salem was purposeful. Those royals he shopped for were the same ones who decided on lucrative construction contracts. Salem assigned each of his brothers a prince to cultivate, while he worked on accumulating powerful cronies in the United States. A wheeler-dealer, Jim Bath, who had served in the Texas Air National Guard with George W. Bush, was his route into the upper reaches of Texas politics — the Bushes, the Bentsens and particularly James Baker, later secretary of state, whom the bin Ladens’ lawyer called the family’s “favorite politician.” Since Salem’s own death in a plane crash in 1988, the family’s present patriarch, Bakr, has nurtured his American ties, both as an investor in the powerful Carlyle Group and as a donor to Jimmy Carter’s causes. The bin Ladens, Coll writes, came to own “an impressive share of the America upon which Osama declared war.” ...