When it took over responsibility for Toronto Pearson International Airport, the Greater Toronto Airports Authority (GTAA) had a desperate need to rebuild its facilities. Now that has been done, the next phase of strategic development can beginWith over 30 million passengers a year, Toronto Pearson International Airport is the busiest airport in Canada. When the Greater Toronto Airports Authority (GTAA) was established in 1996, however, the facilities it inherited from the government were nothing less than deplorable.