Inability of an individual or a group to perform the given tasks up to the established standards. http://www.businessdictionary.com/definition/deficiency-performance.html.
TSA Requirements. The TSA requires that adult passengers ages 18 and older show valid photo ID at the security checkpoint. Children, however, are not required to present such identification. This does not mean, however, that children will be able to fly without it.
The answer is yes for your children 12 years old or younger. If you have TSA Precheck benefits, you can bring your kids age 12 or under with you through the TSA Precheck lane. According to the TSA website: