The NSC was funneling arms to the Nicaraguan contras before Oliver North’s resupply network was operational. US aid to Saudi Arabia was being forwarded to the contras via the Karachi, Pakistan-based Bank of Credit & Commerce International (BCCI). 
While House of Saud-bound money was being diverted towards the contras, one of BCCI’s biggest initial depositors was the Shah of Iran, whose Swiss BCCI accounts were bulging.
With the ruling families of the Nixon’s “Twin Pillars” on board, BCCI would become the mixing bowl into which Persian Gulf petrodollars were stirred with generous helpings of drug money to finance worldwide covert operations for the CIA and its Israeli Mossad and British MI6 partners.
BCCI was the bank of choice for the world’s most notorious dictators, including the Somoza family, Saddam Hussein, Philippine strongman Ferdinand Marcos and Haiti’s Jean-Claude “Papa Doc” Duvalier. The South African apartheid regime used BCCI, as did Manuel Noriega, who strode into BCCI’s Panama branch regularly to collect his $200,000/year CIA paycheck.
BCCI was favorite laundry mat for the Medellin Cartel and for the world’s newest heroin kingpins, the leaders of the CIA-controlled factions of the Afghan mujahadeen. BCCI financed Reagan’s secret arms sales to Iran and worked with Robert Calvi’s Banco Amrosiano. It was the conduit for dirty money generated by Mossad fugitive financier Marc Rich and washed the funny money emanating from the now bankrupt Enron in its reincarnated state as Chicago-based Pinnacle Banc Group. 
Frequenting the Karachi headquarters of BCCI was valued account-holder Osama bin Laden.
With branches in 76 countries, BCCI dealt in conventional and nuclear weapons, gold, drugs, mercenary armies, intelligence and counter-intelligence. These interests were often shielded behind more legitimate fronts such as the shipping of Honduran coffee or Vietnamese beans. The bank had close relations with the CIA, Pakistan’s ISI, the Israeli Mossad and Saudi intelligence agencies. It was the financial glue that bonded numerous seemingly disparate public scandals together.
BCCI’s main stockholders were monarchs and wealthy oil sheiks from the Reagan-manufactured Gulf Cooperation Council (GCC) nations.