CNN World News:
4 killed, 40 injured in incident near UK Parliament, police say
Police believe 'Islamist-related terrorism' inspired attack
Trump's son criticizes London mayor after attack
Eyewitnesses: 'There were bodies on the bridge -- it was horrendous'
London attack is part of a disturbing trend
Trump, US lawmakers react to UK attack
British politicians tweet through their lockdown
Opinion: A barbarian cannot change Britain
Opinion: London shows the challenge of preventing low-tech terror
Gallery: Dramatic pictures of the attack
How the attack unfolded
Politician rushes to victim's aid
May: 'Terrorist attack' was 'no accident'
House Intel chairman: Trump's personal comms collected?
Trump making personal calls as GOP work on last-minute health care deal