Former National Football League Pro Bowler Karl Mecklenburg will be one of the featured speakers when the Iowa Communications Alliance has its second annual meeting and exposition March 3-5  at Community Choice Credit Union Convention Center at Veterans Memorial. Nearly 1,000 communications industry professionals are expected to attend, according to a release. Mecklenburg was a linebacker for the Denver Broncos. The Iowa Communications Alliance represents more than 130 rural telecommunications providers. For more information or to register, visit the alliance website atwww.iacommunicationsall.org.