"South Korea and the United States have been working to secure an early operational capability of the THAAD system in response to North Korea's advancing nuclear and missile threat", the ministry said in a statement, adding that the battery is expected to be operational by the end of the year.
The latter remark is perhaps the clearest indication yet that the new commander in chief is mulling whether he might have to, if all other options fail to disarm the North's leader, Kim Jong-un, use US military force in an attempt to do so.
Harris called defending the USA homeland his "top priority".
In light of that, he said, "I must assume that the Kim Jong Un's nuclear claims are true, I know his aspirations certainly are".
Among the options, the official said, the administration is considering placing North Korea back on the list of state sponsors of terrorism.
"I'm fine coming here", he said.
"In confronting the North Korean threat, it is critical that the USA be guided by a strong sense of resolve both publicly and privately in order to bring Kim Jong Un to his senses, not his knees", Harris said.
North Korea denounced the USA actions.
The PACOM commander told the committee that North Korea is "clearly in a position to threaten Hawaii today". "Somewhere, we would have to make a decision about which missiles to take out and that's a hard decision". "However, we remain prepared to defend ourselves and our allies", it said in a joint statement on Wednesday. "We need more interceptors".
"One of these days soon, he will succeed", Harris said.
South Korea's trumpeting of progress in setting up the Terminal High-Altitude Area Defence system, or THAAD, came as high-powered United States military vessels converged on the Peninsula. Components for the system arrived in South Korea in early March and on Tuesday they were deployed.
The US and South Korean militaries have been reluctant to publicly discuss the progress of the deployment ahead of the South Korean presidential election.
The deployment has also drawn major criticism from China that sees the anti-missile system's long-range radar capability being used to track China's own missile systems.
"It's not in China's interest to have an unstable North Korea with nuclear weapons right on its border".
"China is doing things", he noted without providing details.
"I think the President is sending a signal that this is important", Cornyn said. He said China opposes "war and unrest" on the Korean Peninsula.
China, which has grown increasingly frustrated with North Korea, its ally, and Russian Federation see the system's powerful radars as a security threat.
A statement released Wednesday says Japanese aircraft are integrated with ongoing training by the USS Carl Vinson's air wing. While the administration has said repeatedly that military strikes remain an option, officials have stressed tougher sanctions given the risks of massive North Korean retaliation. "So that is all on me".
The United States and North Korea have stepped up warnings to each other in recent weeks over North Korea's development of nuclear weapons and missiles in defiance of U.N. resolutions. He said the carrier is expected to move north in a few days.
It was unclear whether the official was referring to deploying missile defenses to South Korea and naval military assets to the Sea of Japan.