Mei Li:
In Morse code what letter is represented by one dash??
Shuai Zheng:
t
Mei Li:
Burgess, Philby, Maclean...... . Who was known as the 'Fourth Man'??
Shuai Zheng:
anthony blunt
Mei Li:
With what invention do you associate the name of Mr. Whitcomb Judson??
Shuai Zheng:
zip fastener