Greifeld said the exchange intentionally kept service out for hours to perform technical checks.
The various aspects of the study to validate through piloting are discussed, including technical checks, usability checks, and data checks.
When he arrives at the ground - usually three hours before kick off - he does a quick technical check up.
Early this morning Singapore Airlines said its A380 services would continue as technical checks had been completed.
The Guardian has adopted a stringent approach to redacting the documents, including several layers of editorial and technical checks of the data.
However, British Airways -- the only other airline to fly Concordes -- resumed its normal service today after getting preliminary information from crash investigators in France and conducting extensive technical checks of the fleet's engines, hydraulic systems and airframes.
The contributions of the study include describing methods for child- and program-level accountability in training and areas for improvement including further supporting the completion of technical checks for intervention services.
His lawyer, Ben Wizner, said he needed to perform technical checks for another event on Wednesday in which he was scheduled to appear remotely with Mr. Stone and the actor who portrays him in "Snowden," Joseph Gordon-Levitt.
In a comment to the commission addressing the changes proposed last year, Facebook said that it had tiered screening, including "technical checks at sign-up, social verifications and reports from our community to help identify child accounts," which were deleted once they are identified.
He made technical checks as the remaining miners were brought to the surface, then made the same journey himself.
