Kenneth Iwamasa, who pleaded guilty last year to one count of conspiracy to distribute ketamine causing death, said he "will forever regret" his actions.
Tedros Adhanom Ghebreyesus said fighting in DR Congo was hampering efforts to stop spread
The US president says he believes Iran wants to reach a deal but there is still no agreement on its terms.
Rescuers in Laos have found five villagers alive inside a flooded cave after they were trapped for a week.
Israel's military tells residents of Tyre it will "act forcefully" against the armed group, after another wave of strikes in south and east Lebanon.
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