Biden says will contact Xi in wake of balloon shoot-down

"I expect to be speaking with President Xi and... we're going to get to the bottom of this," Biden said in his most extensive public remarks since the incident on February 4.

While stressing that the United States is "not looking for a new Cold War," Biden said he made "no apologies for taking down that balloon."

"We'll always act to protect the interests of the American people and the security of the American people," Biden said.

The United States has been in a state of alarm since a huge white balloon from China was spotted tracking over a series of top-secret nuclear weapons sites before being shot down just off the east coast.

In the wake of the incident, the US military adjusted radar settings to detect smaller objects and promptly discovered three more unidentified craft that Biden ordered shot down -- one over Alaska, another over Canada and the third over Lake Huron off Michigan.

China says the balloon was just a stray weather research craft, but US officials say they have conclusive evidence that the balloon was sent to spy.

The incident has prompted a diplomatic rift, with Secretary of State Antony Blinken abruptly canceling a rare visit to China. Beijing accused Washington of overreacting and claimed that US balloons had overflown Chinese territory, something the Biden administration denies.

Biden drew a clear distinction between the Chinese balloon and the three smaller objects shot down later.

"We don't yet know exactly what these three objects were," Biden said.

He added that "nothing right now suggests they're related to China's spy balloon program," while the US intelligence community's current assessment is that they are "most likely balloons tied to private companies" or research projects.

However, "if any object presents a threat to the safety, security (of) the American people, I will take it down," Biden said.