Security upgraded at Capitol after Soleimani drone strike, sources say

Security has been upgraded at the Capitol after the U.S. drone strike that killed Iranian general Qassem Soleimani and prompted vows of retaliation from Iran. "Never underestimate the Iranians," one senior congressional source told Fox News. "They have a very strong presence here." Another source added, "We don't know what they're going to do," noting that "raising the security levels to some degree is prudent." Fox News is told one area of constant concern on Capitol Hill is a potential cyberattack.