American Airlines Group Inc. was born on Monday after AMR Corp.'s American Airlines stepped out of bankruptcy and merged with US Airways Group Inc., the Wall Street Journal reported yesterday. Under the terms of the stock-swap merger, US Airways shareholders received 28 percent of the new company's shares, while AMR's creditors and equity interests are slated to receive the rest. The two-year restructuring and complex merger agreement will repay AMR's creditors with interest and give its big unions and common holders a big portion of equity in the new company.