U.S. National Security Advisor H.R. McMaster (L) and White House spokesman Sean Spicer arrive for a press briefing at the White House in Washington D.C. May 16, 2017. H.R. McMaster said on Tuesday that it was "wholly appropriate" for President Donald Trump to share classified information with Russian officials during their meeting in the Oval Office last week. (Xinhua/Yin Bogu)
