A Singapore Armed Forces F-16 fighter jet flies in synchronized manner with an AH-65 Apache assault helicopter during an aerial display on Tuesday Feb. 2, 2010 in Singapore, on the opening day of the Singapore Airshow 2010, Asia's largest aerospace and defense exhibition to be held in the city-state.
(AP Photo/Wong Maye-E)

Airmen from the Republic of Singapore Air Force (RSAF) assemble an Elbit Hermes 450 unmanned aerial vehicle (UAV) at the Singapore Airshow February 1, 2010. The aviation business, badly hit by the economic crisis and the bankruptcy of Japan Airlines, is unlikely to find much to cheer about at this year's first major industry event, the Singapore Airshow.
REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT MILITARY)

An H-450 Hermes UAV is assembled by the Singapore Armed Forces on Monday Feb. 1, 2010, in Singapore, a day before the start of the Singapore Airshow 2010, Asia's largest aerospace and defense exhibition.
(AP Photo/Wong Maye-E)

Airmen from the Republic of Singapore Air Force (RSAF) assemble an Elbit Hermes 450 unmanned aerial vehicle (UAV) at the Singapore Airshow February 1, 2010. The aviation business, badly hit by the economic crisis and the bankruptcy of Japan Airlines, is unlikely to find much to cheer about at this year's first major industry event, the Singapore Airshow.
REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT MILITARY)

Navy delegates speak near a ST Electronics Venus Unmanned Surface Vehicle on exhibit at the Singapore Airshow February 2, 2010.
REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS MILITARY)

Trade visitors visit the Singapore Technologies (ST) Engineering display area at the Singapore Airshow February 2, 2010. The world's largest aircraft repair company, Singapore Technologies Engineering, is cautious about business prospects this year because of uncertainties over global economic growth, its CEO said on Monday.
REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT MILITARY)