The London subway bombing killed 52 people. In the 23 days since that occured approximately 2,650 people were killed via auto accidents in the USA. Approximately 1,827 gun deaths in the USA.
Using the odds of dying in a terrorist related attack during your lifetime as noted below from the CDC, let's compare them to the odds of dying from a long list of real, everyday dangers.
1 in 88,000 of a terrorist attack
1 in 1,500,000 of a terrorist-caused shopping mall disaster assuming one such incident a week and you shop two hours a week
1 in 55,000,000 in a terrorist-caused plane disaster assuming one such incident a month and you fly once a month ( 1 )
Also from the CDC
1 in 55,928 of death by lightening
1 in 20,605 in your clothes igniting
1 in 10,455 of dying in your bathtub
1 in 10,010 by falling from a ladder or scaffolding
1 in 9,396 due to excessive heat
1 in 8,389 due to excessive cold
1 in 7,972 in a drowning accident
1 in 6,842 in a railway accident.
Using odds of dying in a way that Americans can relate to, let's compare the above numbers to the odds of dying during your lifetime to homicide from various forms of weapons.
1 in 197 of dying in a homicide
1 in 299 of dying in an assault from a firearm
1 in 5,330 of dying in an assault by hanging or strangulation
" Now, the question that every American must ask themselves is this; am I willing to give up my Constitutional freedoms in hopes of avoiding death by lightening, which is 983 times more likely than dying because a terrorists crashes an airplane? Are you willing to live in a Republican/Nazi police state in hopes that you don't die from your clothes catching fire (2669 times more likely) or falling in your bathtub (5261 times more likely)? Are you seriously asking this regime to protect you from being strangled or hanged when the odds of that happening is 10318 times more probable than dying in a terrorist-caused attack? Are you, at your very core, comfortable with the idea of leaving to your children a world in which Republicans/Nazis/fascists control all American's everyday life?" - http://www.anotherperspective.org/advoc530.html