The foiled terrorist plot to blow up as many as 10 U.S. airplanes departing the UK using liquid explosives bears striking resemblance to "Operation Bojinka," the failed al-Qaida-financed attack on airliners in 1995 that became a precursor to 9-11, counterterrorism analysts say. Operation Bojinka – a plot to bomb more than a dozen airliners over the Pacific Ocean simultaneously – was developed in Manila by Ramzi Yousef, a planner of the 1993 World Trade Center attack, and 9-11 mastermind Khalid Sheikh Mohammed, according to Philippines authorities. The key to the Bojinka plot was the use of liquid chemical bombs and...