BBC: The US has said it will not hesitate to defend its interests and those of its allies as Iran continues missile tests.
Secretary of State Condoleezza Rice said the US had increased its security in the region and Iran should not be "confused" about US capabilities.
Iran tested missiles on Wednesday that could reach Israel, and on Thursday carried out further tests.
Meanwhile French energy giant Total has said it will not invest in Iran because it is too politically risky.
New tests
Condoleezza Rice was speaking during a visit to Georgia.
She said: "We take very strongly our obligation to defend our allies and we intend to do that. US Warns Iran on Missile Threat >>> | July 10, 2008
BBC:
Israel ‘Ready to Act’ over Iran >>> | July 10, 2008
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