things that other countries have done. >> thank you so much, randi weingarten, and for coming in. >> thank you. >> can anything be done, i'll ask the chairman of homeland security live next on cnn newsroom. first, alison kosik with this week's "before the bell." >> hi, ana. volatility is back. wild swings in the market last week as nervous investors piled into gold, government bonds and other safe havens. wall street is worried about slowing global growth and escalating trade war. and it's watching china's currency. sending global markets into a tailspin, despite the roller coaster ride, some market strategists think wall street is overreacting. >> fundamental construct of the united states stock market remains the most stable and