US-Iran tensions grew in May 2019 when Iran mined ships and shot down a US drone.
"Through the course of the COVID crisis we saw a surge of maritime activity,"
The massive carrier was sidelined for about 10 weeks because of the outbreak which infected a fifth of its 5,000 sailors.
Michael White had been released from an Iranian prison in mid-March on medical furlough but was held in Iran under Swiss custody.
All three incidents in the past two months have taken place in international airspace over the eastern Mediterranean.
Close to an hour after announcing lockdown, the base reported the shooter had been neutralized.
Meanwhile at least 18 sailors aboard a US Navy destroyer have tested positive for the new coronavirus.
Tensions between Iran and the United States increased earlier this year after the United States killed Qassem Soleimani, the head of Iran’s elite Quds Force, in a drone strike in Iraq.
The Russian Ministry of Defense claims that the US aircraft was heading toward the Khmeimim Air Base in Latakia, Syria where Russian troops and equipment are stationed
The hospital ships were one of the few suggestions some analysts have made when discussing what the US Armed Forces could do to help stem the spread of the coronavirus.