Senators can threaten a bill with unlimited debate unless sixty senators vote to prevent it.

VOA: special.2010.01.23

He said the United States will "take appropriate steps to let North Korea know that it can't threaten the safety and security of other countries with impunity."

VOA: standard.2009.04.03

He is replacing it with a plan that would provide a combined land- and sea-based capability more quickly, focused on shorter range missiles Iran could use to threaten Europe, with the option of expanding later to cover longer range missiles if necessary.

VOA: standard.2009.10.23