Reminds me of the IRA Brighton bomb which was aimed at killing Margaret Thatcher.
No remote, just a timer.
https://en.wikipedia.org/wiki/Brighton_hotel_bombing
And then the quote:
"Today we were unlucky, but remember we only have to be lucky once - you will have to be lucky always."
http://news.bbc.co.uk/onthisday/hi/witness/october/12/newsid...