CANBERRA - Australia's federal Budget this week will include further provisions for new spending on airport security. The move comes as Australia sends more armed sky marshals into the skies to offer increased protection for passengers flying to and from the United States. According to reports, some "high risk" flights between Australia and the US will carry up to six armed guards. Undercover guards already fly on some Qantas flights between Australia and Singapore, and negotiations are reportedly taking place with other countries, including Malaysia, on extending the programme. Qantas is believed to be sharing the cost of having the guards on board its aircraft.