There were some concerns about the safety of the huge Redstone rocket that was to carry the spacecraft.

VOA: special.2011.05.15

There are concerns that some could accept the standards and then lack the money to follow them.

VOA: special.2010.07.22

Also,there are concerns that some organisms could begin to resist the plants designed to resist them.

VOA: special.2009.10.27

But there are concerns that Japan and the United States could face a "double-dip" recession.

VOA: special.2009.08.21

But there are concerns that increased investment in medical services for the wealthy will draw resources from the region's public hospitals.

VOA: standard.2009.12.23

But there are concerns that increasing budget deficits and a return to inflation could stall the economic recovery.

VOA: standard.2009.10.16

"There are a number of deficiencies with it that do not answer the concerns of the international community."

VOA: standard.2010.05.25

"Definitely with something as relevant in our world as genetic research, there are serious moral and ethical concerns and responsibility that is necessary.

VOA: standard.2010.06.09

But there are concerns that drone airstrikes and ongoing fighting along the Afghan border could overshadow those efforts, turning more locals against the Pakistani government.

VOA: standard.2009.03.26

There have been concerns expressed that a run-off election cannot safely be held in the coming weeks because of security threats and oncoming winter weather.

VOA: standard.2009.10.19

"I think that there are,already, concerns that the interim government will use their control of the local governments to stuff the ballots and rig the vote."

VOA: standard.2010.06.22

Secretary Gates said there are some "exaggerated concerns" in the region that a so-called "grand bargain" with Iran will be negotiated in secret and then sprung on the region without warning.

VOA: standard.2009.05.05