CLICK HERE If you are having trouble viewing this video on a mobile device. By Mary Clare Jalonick | Associated Press WASHINGTON — National security adviser John Bolton was so alarmed by Rudy Giuliani’s back-channel activities in Ukraine that he described President Donald Trump’s personal lawyer as a “hand grenade who is going to blow everybody up,” according to a former White House aide. The aide, Fiona Hill, testified for more than 10 hours on Monday as part of the Democrats’ impeachment probe into Trump’s dealings with Ukraine. She detailed Bolton’s concerns to lawmakers and told them that she had at least two meetings with National Security Council lawyer John Eisenberg about the matter at Bolton’s request, according to a person familiar with the testimony who requested anonymity to discuss the confidential interview.Those meetings took place in early July, weeks before a July 25 phone call between Trump and Ukrainian President Volodymyr Zelenskiy, in which Trump urged that Zelenskiy investigate political rival Joe Biden’s family and Ukraine’s own involvement in the 2016 presidential election. A whistleblower complaint about that call, later made public, prompted House Speaker Nancy Pelosi to launch the impeachment inquiry. Giuliani is Trump’s personal lawyer and was…