The first step uses a bit of influenza DNA to get the patient's immune system to begin fighting off the flu, and then the protection is given a "boost" some time later by the second step, which can be either another bit of DNA or a conventional flu vaccine.

VOA: standard.2010.07.21

Aldrin was the second man to step foot on the moon during the Apollo 11 mission in July 1969.

VOA: standard.2010.04.15

Second,he says, Lithuania is taking a step forward into the electricity market that he adds,will change the planned system of energy into a market based system.

VOA: standard.2010.01.01

"He was telling me I need to finish second, and he was also telling me 'Don't step on the line,' and he was also telling me, 'Just try to stay close.' They shot the gun and I saw him for about maybe two or three seconds.

VOA: standard.2009.08.21