Building and Land Technology acquired Atlanta's landmark office complex Concourse Corporate Center, plus a prime parcel of land, for $489 million from Regent Partners, Commercial Property Executive reports. Brooklyn's Barclays Center is completing the largest green roof ever put on a sports arena in the U.S., reveals the Wall Street Journal. Mexican telecom mogul Carlos Slim Helú is rapidly expanding his commercial real estate portfolio in the U.S., most recently with two iconic buildings in New York State and Detroit, notes Forbes. These are among today's must reads from around the commercial real estate industry.