Lawmakers from Maryland and Virginia believe the recent commercial jet collision with a military helicopter over the Potomac River on Wednesday will discourage any further flight expansions in one of the nation’s most congested air corridors.

While congressional members are hesitant to jump to conclusions until an in-depth investigation is completed by the National Transportation Safety Board (NTSB), lawmakers are underscoring concerns they had leveled for years over the congestion in the skies above the nation’s capital.