The U.S. ambassador to the United Nations had a message for North Korea on Wednesday: "We're not trying to pick a fight so don't try and give us one". The ball is in their court.
Weapons analysts said they believed some of the missiles on display were new types of intercontinental ballistic missiles.
U.S. Vice President Mike Pence made a pitch for President Donald Trump's economic policies, telling U.S. and Japanese business leaders that a tax overhaul and cut in regulations will help business on both sides of the Pacific.
U.S House of Representatives Speaker Paul Ryan said military action must remain an option for the U.S during a visit to London.
USA officials said there was a higher-than-usual level of activity by Chinese bombers, signalling a possible heightened state of readiness by Beijing, reclusive North Korea's sole major ally, although the officials played down concerns and left open a range of possible reasons.
A separate critical test in the Pacific region, to be held at the end of May, will examine the ability of the United States to shoot down a future North Korean intercontinental ballistic missile that could threaten the US.
New footage from North Korea's birthday celebrations for founding father Kim Il-sung has revealed the extravaganza ended with a bang, showing a mock-up video of missiles striking the United States that drew cheers from the audience and smiles from leader Kim Jong-un. Every Republican and every Democrat has screwed up North Korea.
"I said, 'Do you want on your resume that during your presidency the North Koreans developed a missile that could hit the American homeland with a nuclear weapon on top of it?'"
North Korean military participate in the celebration of the 70th anniversary of the founding of the ruling Workers' Party of Korea.
The proposed statement on April 19 would have demanded that North Korea "conduct no further nuclear tests" and halt missile launches after Pyongyang carried out a failed test over the weekend.
William Perry, who served as USA defense secretary from 1994 to 1997 and negotiated with North Korea, said he did not believe Pyongyang was planning a surprise attack, despite the fiery rhetoric.
From two continents, Pence and Defense Secretary Jim Mattis warned that North Korea's latest failed missile launch was a reckless act of provocation and assured allies in Asia that the US was ready to work to achieve a peaceful denuclearization of the Korean Peninsula.
It said that it had requested Security Council discussions on US-South Korean military exercises "several times".
Russian Federation wanted to include language contained in a previous statement stressing the need to achieve a solution through dialogue, according to council diplomats.
Whether agreement can be reached on a statement remains to be seen. The U.S., which backed South Korea in the war, maintains about 28,500 servicemembers on the peninsula.
The U.N. Security Council on Thursday unanimously adopted a press statement strongly condemning North Korea's latest missile launch.
The paper, obtained by The Associated Press, says the North's latest actions "make clear that further global pressure is required for the DPRK to change its behaviour if there is to be any hope for meaningful denuclearization talks to resume".
The council also warned the North of "further significant measures, including sanctions".