It looks like the Bush administration's Homeland Security is not really protecting the country. The airport security will stop you from taking a large bottle of hand cream on a plane, but you can travel if you have a highly contagious case of TB (see NY Times). Grandmothers are patted down, but if you have the ability to infect 300 people on an international flight with TB, you can step to the front of the line.
The CDC and Homeland Security need to examine how this man was able to move about without any restrictions. How many other people could have been infected--- airline ticket personnel, restaurant employees, cab drivers, and store clerks? We may never know the full extent of this security failure.