The next-generation stealth bomber is expected to be able to gather intelligence as well as carry out attacks.
Bittersweet victory as four-time champions get eliminated for the second World Cup in a row.
Japanese and US pharmaceuticals publish results of a trial being hailed as a breakthrough.
Outlook was, however, darkened by news that manufacturing activity contracted in November for first time in 2.5 years.
Stephanie Frappart oversaw the final Group E game between Germany and Costa Rica in Qatar's Al Bayt Stadium.
Four-time champions eliminated for a second straight World Cup in the group stage.
Japan finish as winners of World Cup Group E, while Spain squeak through to the round of 16 on goal difference.
