The e-DMV struck a design balance between space and limitations at the DMV. Using a retinal scanner to verify user information, the e-DMV electronic booths are designed to stay open 24 hours a day for renewing driver's licenses. Because license renewal takes up much of DMV personnel time, the DMV is not able to thoroughly investigate questionable renewals and first-time driver's license applications. Many of the 9-11 terrorists presented fake or phony informaton to obtain valid driver's licenses.