AFRICOM said that it carried out 495 airstrikes against militant vehicles and positions in the former IS stronghold of Sirte, Operation Odyssey Lightning concluded on 19 December, following an announcement from the Libyan government of the end of offensive military operations in Sirte. On 18 January 2017, ABC News reported that two USAF B-2 bombers struck two ISIL camps 28 miles south of Sirte. The airstrikes targeted between 80 and 100 ISIS fighters in multiple camps, an uncrewed aircraft also participated in the airstrikes. One official called the airstrikes "a huge success," with more than 80 ISIL fighters killed, one counterterrorism official told ABC News there were "zero survivors" at the camps. Many of the ISIS fighters in the camps had fled Sirte during the battle, according to another official; Pentagon press secretary Peter Cook said in a statement ISIS fighters had fled to the remote desert camps "in order to reorganize and they posed a security threat to Libya, the region, and U.S. national interests;" The militants were carrying weapons, wearing tactical vests and standing in formation. The airstrikes were authorised by President Obama and were carried out in coordination with GNA; they are considered to be an extension of Operation Odyssey Lightning. BBC News reported that the B-2s flew a round-trip of around 34 hours from Missouri and dropped around 100 bombs on their targets, US Defence Secretary Ash Carter said those targeted were "actively planning" attacks in Europe. NBC News later reported that the number of ISIL fighters killed was revised upward to 90; a U.S. defense official said that "This was the largest remaining ISIS presence in Libya," and that "They have been largely marginalised but I am hesitant to say they've been completely eliminated in Libya." On 22 September 2017, the US military conducted 6 airstrikes with unmanned aircraft on an ISI: camp 150 miles southeast of Sirte, killing 17 militants and destroying three vehicles. CNN reported an AFRICOM statement that the strikes took place "In coordination with Libya's Government of National Accord and aligned forces" and that "The camp was used by ISIS to move fighters in and out of the country; stockpile weapons and equipment; and to plot and conduct attacks". The strikes marked the first time airstrikes had been carried out in the country under the Donald Trump administration. Other actions The U.S. military has been closely monitoring ISIL movements in Libya,