Dana White, a Pentagon spokeswoman, said that the commitment to US allies is "ironclad" and that the United States is prepared to use "the full range of capabilities at our disposal against the growing threat from North Korea".
Mattis said, "As General Brooks said it so well, it is our self-restraint that has prevented war in the face of provocations, shelling of Korean - South - of Republic of Korea - South Korea islands, sinking of a South Korean naval vessel".
South Korean and Japanese warplanes as well as US F-16 fighters joined the U.S. bombers for parts of Friday's mission, during which the bombers used inert weapons to practice attacks on a South Korea firing range.
North Korea announced on Tuesday it successfully test-launched an ICBM, saying the missile was capable of carrying a large and heavy nuclear warhead.
The Guam-based B-1B bombers flew to the divided peninsula where they were joined by South Korean and USA fighter jets.
While the Pentagon has drawn up an array of plans for a possible military intervention in North Korea, Mattis said he did not think America was closer to war because of the test.
The United States had circulated the statement for adoption by the 15-member council after announcing plans for a new sanctions resolution, but Russian Federation raised objections, UN diplomats said.
Despite the sabre-rattling, the United States and South Korea have said they are committed to resolving the crisis over the North's pursuit of nuclear weapons and ballistic missile peacefully. "We can hold senior regime officials accountable", Haley said.
A storm disturbance in the Atlantic could impact SC
THE ALABAMA WEEKEND: For the weekend, no major change in the pattern and we are going to stick with the standard summer forecast. On the present forecast track, Tropical Depression Four will likely pass a safe distance to the north of the islands on Sunday.
The supreme leader of North Korea was only feet from the base of the Hwasong-14 which has untested liquid-fueled rocket engine.
The drill simulated the two U.S. bombers destroying enemy ballistic missile batteries and South Korean jets mounting precision strikes against underground enemy command posts, the South's air force said.
Mr. Trump's national security team agrees North Korea is a grave threat.
"Through this drill, the South Korean and U.S. air forces demonstrated strong determination to thoroughly punish the enemy for its provocative acts, and showed off their capability to pulverise enemy command posts", it said.
On the sidelines of the G20 summit, Trump, Moon and Japanese Prime Minister Shinzo Abe agreed to apply "maximum pressure" to counter the North nuclear threat. South Korea's military later released previously shot video showing the test-firing of sophisticated South Korean missiles and a computer-generated image depicting a North Korean flag in flames with the backdrop of a major building in Pyongyang, North Korea's capital. "We stand ready to provide (military) options if they are necessary".
Before he flew to Germany, Trump warned there would be "some pretty severe" consequences to North Korea's actions.
The Pentagon insisting the U.S. is capable of defending itself against the new threat.
The North's leader Kim Jong-Un described the ICBM launch - staged on the US Independence Day holiday - as a gift to "American b******" and vowed to give more "gift packages" to the US in the future.