WASHINGTON — Japan has suspended some imports of U.S. wheat after genetically engineered wheat was found on an Oregon farm.

The Agriculture Department announced the discovery of the modified wheat on Wednesday. No genetically engineered wheat has been approved for U.S. farming.

BOSTON — Should patients undergoing broad DNA testing for a specific ailment be told of unexpected findings that signal risk of cancer or other serious diseases, even if they don’t request the information?

The question is at the core of a battle brewing among doctors and ethicists amid growing use of gene sequencing for clinical use and the plethora of information that results from such tests. Writing Thursday in the journal Science, a team of ethicists said patients should decide how much they want to know and how deeply scientists should look into their genome.

KABUL, Afghanistan — A suicide car bombing tore through a U.S. convoy in Kabul on Thursday, killing at least 15 people including six Americans in a blast so powerful it rattled the other side of the Afghan capital. U.S. soldiers rushed to help, some wearing only T-shirts or shorts under their body armor.

WASHINGTON — Congress is rethinking the broad authority it gave the president to wage a war on terror after the Sept. 11, 2001, terrorist attacks in light of how President Barack Obama has used the power to target suspected terrorists with lethal drone strikes.