Brussels Attacks Renew Criticism of Security at Europe’s Airports

LONDON — The suicide attacks at Brussels Airport have led to intensified scrutiny of hiring, security and the lack of standardized procedures at airports across Europe, amid questions about whether the bombings last week could have been prevented.

The head of the largest police union in Belgium warned on Thursday of a serious security problem at Brussels Airport, citing systematic security flaws, bureaucratic incompetence and the employment of baggage handlers with criminal records.