Numerous airlines on Tuesday morning were forced to cancel hundreds of flights to and from Scotland and several other regions as the latest volcanic ash crisis continued to intensify.
American Airlines and British Airways will begin operating a shuttle-type operation between New York and London-Heathrow, with flights departing every 30 minutes during evening hours.
Chechen Islamist rebel leader Dokka Umarov on Tuesday claimed responsibility for ordering a suicide bombing that killed 36 people and injured hundreds more at Moscow's busiest airport in January.