good evening. i m erin burnett. outfront tonight, a trump white house insider testifies. tonight, cnn has learned that former vice president mike pence s chief of staff, marc short, testified before a federal grand jury investigating january 6th. he is believed to be the highest ranking official in trump s white house to cooperate with the federal investigation. now, in just a moment i m going to speak with marc short live. he is a valuable witness. the day before the january 6th rally, he grew concerned about president trump s attack on pence and warned the secret service. here s a portion of his testimony to the january 6th select committee. concern was for the vice president s security, and so i wanted to make sure the head of the vice president s secret service was aware that likely as these disagreements became more public that the president would lash out in some way. and on january 6th, short was with the vice president who had to be rushed to safety when an an
arms race underway between world superpowers. right now, the united states is running behind. w oren liebermann is outfront. at the white sands range, the first test of the u.s. hypersonic missile was a success. the fire system is a ground-based boost glide missile, hypersonic glide weapon, launched atop a booster rocket. the launch was designed to test the launch platform, not the full weapon. defense official says there are more tests planned for later this year. but the countdown is on to develop an operational hypersonic weapon, especially as adversaries like russia and china have pushed ahead of the u.s. in this field. each country approaches their national defense in different ways and means, and they have different approaches to how they re doing it. so, they are overall ahead of us in terms of being able to field a class of hypersonic weapon. reporter: the u.s. is racing