For the first time in three years.
From the link:
For the first time since the start of the financial crisis in August 2007, U.S. investors own more Treasuries than foreign holders.
Mutual funds, households and banks have boosted the domestic share of the $8.18 trillion in tradable U.S. debt to 50.2 percent as of May, according to the most recent Treasury Department data. The last time holdings were as high, Federal Reserve Chairman Ben S. Bernanke cut interest rates for the first time between scheduled policy meetings as losses in subprime mortgages spurred a flight from riskier assets.