Boeing has released more details of its $1 billion expansion in South Carolina, announcing it has acquired more land. The company said it would begin construction in the second half of 2014 on a 230,000-square-foot building to paint the 787 Dreamliners it builds at its North Charleston assembly plant. Now, 787s built in South Carolina are flown to Fort Worth to be painted and then are returned to South Carolina for delivery to customers. The company also said it had reached agreement with Palmetto Railways, a division of the state Commerce Department, for a long-term lease of about 470 additional acres in North Charleston.