The government cut employers' social charges, which would have created more jobs anyway.
And the final regulations are a stark change from a proposal the agency released in 2007, which would have created a star-based system for UVA protection.
This was one of the problems addressed when the N.H.L. proposed realignment earlier this season, which would have created a four-division league.
But the logic of the proposed tie-up, which would have created a $45 billion European giant, has not gone away.
The airlines and the screening companies resisted the system, which would have created a basis for punishing them for failures, and it was never put into full use.
WorldCom said its appeal would not be an effort to revive the failed purchase, which would have created a bigger rival to AT&T, the long-distance leader.
The deal, which would have created one of the world's biggest specialty chemicals businesses, was struck in July, at the apex of the recent private equity boom.
This assertiveness helped to kill the 2013 memorandum of understanding with Iran, which would have created a bilateral truth commission to look into the Amia bombing.
Not long after his arrest, Sibneft called off the merger of the two oil companies, which would have created the sixth-largest oil producer in the world.
But Tea Party groups complain about his sponsorship of the Dream Act, which would have created a path to citizenship for some illegal immigrants who are students or military veterans.
The two had sought to break up their older competitor's plan to merge with Deutsche Börse of Europe, which would have created a powerful trans-Atlantic company with a big market share in the trading of stocks and derivatives.
