The US military is short on weapons stockpiles and lacks the factories to rebuild them quickly, a weak spot at a moment when Washington is talking tough abroad.

• A recent Defense Department report says munitions supplies are critically low.
• Trump publicly denies any shortage, saying the US has more than it could ever use.
• The deeper problem is manufacturing — the US cannot build weapons fast enough to refill stockpiles.
• Trump is pushing to expand domestic production, which could mean more defense contracts.
• The tough talk has consequences abroad, with a Cuban delegation walking out after threats to deal with "terrible" countries.

Outlook: Expect more pressure and money aimed at speeding up US weapons manufacturing.