America has no such clock.
There was significant divestment form the Defense Sector in the early to mid 1990s' ... End of First Gulf War, Fall of Soviet Union, Peace Dividend, etc.
Much money was thrown at the Defense Sector in the wake of 9/11, but Defense Sector corporate consolidation and poor procurement decisions - such as single sourcing and defining requirements on-the-fly - have given us the underwhelming F-35's, Littoral Warship, and the overdue and overbudget Ford class carriers.
Benchmark weapons of previous wars had similar qualities - technological superiority, superior range, superior lethality, superior resiliance, superior field serviceability, and multiple suppliers.
In the meantime, America's private sector has not been deploying research capitial and manufacturing capital domestically; primarily outsourcing to American economic competitor, India, and future miltary adversary, China.
Many of our civilian and military supply chains have dependencies and single points of failure, mainly with the Chi-coms.
The Chi-coms are building secret police, espionage, and sabotage networks within the United States in preparation for a future war.
Tick ... Tick ... Tick ...