According to NARA , there were an estimated 1.8 million illegal aliens in Pakistan 's commercial capital Karachi in 2007 .
The National Alien Registration Authority ( NARA ) started registering illegal aliens in January 2006 .
According to NARA , there were an estimated 1.8 million illegal aliens in Pakistan 's commercial capital Karachi in 2007 .
The National Alien Registration Authority ( NARA ) started registering illegal aliens in January 2006 .