The suspension of British Airways flights to Saudi Arabia yesterday, following "credible intelligence of a serious threat", is an ominous indication of al-Qa'eda's undiminished capacity to threaten Western global interests. BA had only recently recommenced flights to Nairobi after a similar threat. After the terrorist attack on a Western compound in Riyadh last May, the writing was on the wall for British visitors to Saudi Arabia. There is speculation about a link between the latest BA suspension and the arrest in New York of a British arms dealer allegedly involved in the sale of ground-to-air missiles to terrorists. It is...