Senator John Barrasso, from the western state of Wyoming, says Republicans support a comprehensive plan to double the U.S.investment in energy research.

VOA: standard.2009.05.23

The United States has 62,000 troops in Afghanistan, nearly double the number from last year.

VOA: standard.2009.09.03

A rebound is expected in 2010, but the US government predicts a shift in the makeup of foreign visitors, with arrivals from Asia and South America growing by double digits.

VOA: standard.2010.05.04

Far from declining further, he predicts production will double.

VOA: standard.2010.08.06

"In a short time,we realized that we were going to have 27 wells within a short walk from the house, And as of today,we have 63, with indications that will double in the next two years."

VOA: standard.2010.01.02