The United States said Thursday it had approved a $2.68-billion sale of bombs to Canada, where Prime Minister Mark Carney is sharply expanding defense spending amid uncertainties over relations with Washington. The State Department said the air strike weapons will include up to 3,414 BLU-111 bombs, which weigh 500 pounds (226 kg) each and can hit troop formations, and up to 3,108 GBU-39 bombs, which are meant to hit stationary targets with accuracy. It also includes more than 5,000 JDAM kits to turn unguided bombs into guided munitions.