Read the text and answer question.

Brazil unveils new air traffic control software

Brazil’s air force says it will install new software to improve air traffic control across the nation. The air force says the locally developed software will help avoid a repeat of the chaotic situation in 2007 when radar failures and problems prompted mass cancellations and delays.

The air force said in a statement that Sagitario system will give controllers many improved tools, including better access to weather and flight data.

Air travel demand will increase significantly in Brazil when it hosts the 2014 World Cup and the 2016 Olympics. The government is already working to improve the country’s outdated airport infrastructure.

(Taken from www.news.theage.com.au)

GLOSSARY
unveil – lançar
prompt – provocar
mass cancellations – cancelamentos em massa

According to the text, choose the alternative that does not fill in the blank.

Sagitario is .