“Defence and security officials said that weather had made it difficult to retaliate sooner, with Friday presenting the best conditions for launching strikes.
Though the White House and Pentagon also repeatedly said they were avoiding “telegraphing” operations in the days leading up to the strikes, experts believe they did just that – with the ultimate intention of avoiding a wider war with Iran.
Arabian Gulf States Institute of Washington fellow Hussein Ibish, said the delay appeared to be the US signalling “what they’re not going to do, which is strike inside Iran”.
Mr Mulroy told the BBC it is possible that the US allowed Iranian Revolutionary Guard personnel “to leave the facilities that are going to be struck”.
Experts noted the US must walk a fine line between deterring a country like Iran without igniting a greater conflict.”
https://www.yahoo.com/news/why-did-us-wait-retaliate-020425239.html