Pentagon officials said Thursday that the United States is satisfied that its own munitions readiness levels are intact as the U.S. has been Ukraine's largest supporter, providing $18.6 billion in weapons and equipment. Watch the briefing LIVE in the player above. U.S. Defense Secretary Lloyd Austin recently said the flow of weapons and assistance would continue. Pentagon deputy press secretary Sabrina Singh told reporters, "We're not going to dip below our readiness levels and we continue to assess our readiness levels with each, whether it's a presidential drawdown package or security assistance that we announce."