Officials say he bought materials to build explosive devices and traveled to New York City on September tenth as part of planning for an attack.

VOA: special.2009.10.17

"We will set new standards, expand our cooperation with Russia, and pursue new partnerships to lock down these sensitive materials."

VOA: standard.2010.04.06

The new law would lift tariffs on some of the materials U.S.companies must import to make their products.

VOA: standard.2010.08.11

Six of 10 components of the index deteriorated, including new home permit applications,jobless claims, and factory materials deliveries.

VOA: standard.2010.05.20

And in fact growing worldwide for that reason." Harry Atwater's description of his new design for solar cells is published in the journal Nature Materials.

VOA: standard.2010.02.19