Alexander Petrov and Ruslan Boshirov, charged with the attempted murder of ex-spy Sergei Skripal and his daughter, Yulia. A new report says Boshirov is actually Anatoly Chepiga, a Russian military intelligence officer. U.K. Metropolitan Police/AP hide caption
A specialist team member in a police protective suit in Salisbury, England, last month. British police scoured sections of Salisbury and Amesbury in southwest England, searching for a container feared to be contaminated with traces of the deadly nerve agent Novichok. Matt Dunham/AP hide caption
The main entrance to Salisbury District Hospital as Yulia Skripal is discharged from the hospital on April 10, 2018 in Salisbury, England. Russian ex-spy Sergei Skripal and his daughter Yulia Skripal were attacked with nerve agent Novichok in Salisbury on March 4. Chris J Ratcliffe/Getty Images hide caption
Yulia Skripal speaks to a journalist on Wednesday in London following her March poisoning with a nerve agent in Salisbury along with her father, former Russian spy Sergei Skripal. WPA Pool/Getty Images hide caption
Sergei Skripal has left Salisbury District Hospital, one month after his daughter, Yulia, was also discharged. The pair were found poisoned by an exotic nerve agent in March. Peter Nicholls/Reuters hide caption
The Organization for the Prohibition of Chemical Weapons says the poison used against Sergei and Yulia Skripal "was of high purity." The U.K. has concluded a state actor — namely, Russia — carried out the attack. Peter Dejong/AP hide caption
Yulia Skripal, the daughter of former Russian spy Sergei Skripal, in an image taken from her Facebook page on March 6. AP hide caption
This is a file image of the daughter of former Russian Spy Sergei Skripal, Yulia Skripal taken from Yulia Skipal's Facebook account on Tuesday, March 6. AP hide caption
The main entrance to the Salisbury District Hospital in southern England, seen early last month after Sergei and Yulia Skripal were admitted after their poisoning. On Friday, hospital officials noted that both father and daughter have been improving. Chris J. Ratcliffe/AFP/Getty Images hide caption
Britain's Prime Minister Theresa May stands outside a pub as she views the area where former Russian double agent Sergei Skripal and his daughter were found critically ill in March. Toby Melville/AP hide caption
The Defence Science and Technology Laboratory in Porton Down, U.K., seen last month. Researchers at the lab were tasked with testing the nerve agent used to poison Sergei Skripal and his daughter, Yulia, in early March. Jack Taylor/Getty Images hide caption
Russian Foreign Minister Sergey Lavrov announced Thursday that Moscow is expelling 60 U.S. diplomats. Alexander Zemlianichenko/AP hide caption
Yulia Skripal, seen in an image taken from her Facebook account earlier this month. The 33-year-old daughter of former Russian spy Sergei Skripal is "improving rapidly," according to hospital officials. Yulia Skripal/Facebook via AP hide caption
Britain's Metropolitan Police said Sergei Skripal, a former Russian spy, and his daughter were likely poisoned with a rare nerve agent at his home. Andrew Matthews/AP hide caption