3d Geometry

If the shortest distance between the line joining the points (1, 2, 3) and (2, 3, 4), and the line \({{x - 1} \over 2} = {{y + 1} \over { - 1}} = {{z - 2} \over 0}\) is \(\alpha\), then 28\(\alpha^2\) is equal to ____________.