From Ad Age | About 80 percent of the European participants who planned to attend McDonald’s global convention in Orlando this week have been unable to make it because of lingering ash clouds that have shutdown air travel.

“This has blown a hole in [McDonald's] marketing plans and global initiatives,” said Patrick Larsimont, London-based regional business director for DDB Europe, one of those left behind. “All three roster agencies were all due to [debut] work at the convention.”

Get the full story: adage.com